Iron Core Reactors For Detuning Power Capacitors In

Browse technical resources about solar mounting systems, tracker technology, structural design, and installation best practices.

HOME / Iron Core Reactors For Detuning Power Capacitors In - BeTheFuture Solar Foundation & Infrastructure

Related Topics:

Iron Core Reactors Detuning
  • Why can t capacitors be used as power supplies

    Why can t capacitors be used as power supplies

    The reason why capacitors cannot be used as a replacement for batteries is due to their limited energy storage duration, rapid voltage decay, and lower energy density.


    FAQs about Why can t capacitors be used as power supplies

    Can a capacitor store energy?

    One answer is: Capacitors can temporarily store energy, but they cannot contain as much energy density as batteries, which makes them unsuitable for long-term energy storage and delivering continuous power supply.

    Can a capacitor be used as a battery?

    Capacitors cannot be used as batteries for the following reasons: 1. Extremely low energy density on the order of 1/5 to 1/10th of lead acid batteries 2. Very high WH cost. 3. Extremely high self-discharge rates 4. Cannot use all the energy stored in them. 5.

    What is the role of a capacitor in a power supply?

    As one of the passive components of the capacitor, its role is nothing more than the following: 1. When a capacitor is used in power supply circuits, its major function is to carry out the role of bypass, decoupling, filtering and energy storage. Filtering is an important part of the role of capacitors. It is used in almost all power circuits.

    Can a capacitor replace a battery?

    Limited Energy Storage Duration: One of the primary reasons why capacitors cannot replace batteries is their limited energy storage duration. Capacitors, especially conventional ones, suffer from leakage, which causes the stored charge to dissipate over time. This leakage makes them impractical for long-term energy storage applications.

    Can a battery and a capacitor work together?

    Yes, capacitors and batteries can complement each other in certain applications. Capacitors can be used to provide quick bursts of energy, while batteries handle sustained power supply. How do solar cells work to generate electricity explained simply?

    What is the function of a capacitor?

    Capacitors are widely used to realize many electrical functionalities. As one of the passive components of the capacitor, its role is nothing more than the following: 1. When a capacitor is used in power supply circuits, its major function is to carry out the role of bypass, decoupling, filtering and energy storage.

  • Philippines outdoor power lithium iron phosphate

    Philippines outdoor power lithium iron phosphate

    An Australian-funded lithium iron phosphate battery manufacturing plant in the gigafactory has hit go on the Philippine's first purpose-built battery production line, which is expected to generate an output of 2 GWh of capacity by 2030.


    FAQs about Philippines outdoor power lithium iron phosphate

    Where is the Philippines' first lithium iron phosphate battery factory located?

    Philippines President Ferdinand 'Bong Bong' Marcos Jr has attended the inauguration of the country's first lithium iron phosphate (LFP) battery factory. The event was held today at StB Giga Factory in the Clark Special Economic Zone in Tarlac, a province about 130km from the national capital Manila.

    Where is lithium iron phosphate (LFP) battery made?

    Image: Philippine Board of Investments An Australian-funded lithium iron phosphate (LFP) battery gigafactory has hit go on its production line in the Philippines, 113 kilometres northwest of Manila in the Filinvest Innovation Park (FIP), New Clark City.

    Why should the Philippines invest in LiFePO4 batteries?

    The factory's focus on LiFePO4 batteries, known for their safety and longevity, positions the Philippines as a key player in Southeast Asia's clean energy storage market. It is expected to play a pivotal role in meeting the country's renewable energy goals and the development of a local EV industry

    Who funds Phlippine's first lithium battery factory?

    The Phlippine's first lithium battery factory is funded by Australian equity firm, StB Capital Partners. This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: [email protected].

    How will a new LiFePO4 factory benefit the Philippines?

    In summary, the new factory's local production capacity, export focus, and ability to scale up output will likely contribute to lower costs for LiFePO4 batteries in the Philippines, benefiting industries like renewable energy and electric vehicles, and ultimately making these technologies more accessible to consumers

    Is the Philippines ready for high-tech investments?

    The Philippines is now ready to innovate, to lead, to become the go to destination for high-tech, high impact investments, as the first manufacturing plant in the Philippines for advanced iron phosphate batteries, often used in renewable energy and electrical vehicles,” Marcos said.

  • Does the power supply have magnetic capacitors

    Does the power supply have magnetic capacitors

    A capacitive power supply or capacitive dropper is a type of that uses the of a to reduce higher to a lower voltage. It is a relatively inexpensive method compared to typical solutions using a, however, a relatively large mains-voltage capacitor is required an.


    FAQs about Does the power supply have magnetic capacitors

    What is a power supply capacitor?

    Power supply capacitors enable the smoothing of rectifier outputs through energy storage. A smoothing capacitor bank is often referred to as the bulk capacitance. The energy stored in the bulk capacitance becomes the input to the regulator pass element. Linear power supplies also employ a capacitor at the output of the regulator.

    Which capacitors are used in computer power supplies?

    Other capacitors used in computer power supplies are “metalized polypropylene” capacitors, or “film capacitors”. These are generally used for EMI filtration on the AC input of a power supply. Conclusion

    What is the current through a power supply capacitor?

    The current through a capacitor is equal to: Non-ideal power supply capacitors have equivalent series resistance and leakage current. Common types for power supply capacitors are aluminum electrolytic, tantalum, multilayer ceramic, film. Aluminum and tantalum types are polarity sensitive.

    How does a capacitive power supply work?

    A capacitive power supply usually has a rectifier and filter to generate a direct current from the reduced alternating voltage. Such a supply comprises a capacitor, C1 whose reactance limits the current flowing through the rectifier bridge D1. A resistor, R1, connected in series with it protects against voltage spikes during switching operations.

    Where are the capacitors located on a power supply?

    When we look at almost any power supply application circuit there will be capacitors on the output of the power supply located at the load. One question often asked of power supply vendors is “Why are the output capacitors required on a power supply and how are the capacitors selected?”.

    Why are capacitors important in the design of power supplies?

    This article emphasizes the importance of capacitors and their capacitive properties and topologies in the designs of power supplies. Designs based on capacitive topologies are particularly suitable for power supplies in the milliwatt range. They are simple, compact and economical.

  • Lithium iron phosphate battery wind and solar hybrid power generation system

    Lithium iron phosphate battery wind and solar hybrid power generation system

    Lithium iron phosphate battery (LIPB) is the key equipment of battery energy storage system (BESS), which plays a major role in promoting the economic and stable operation of microgrid. Based on the adva.


    FAQs about Lithium iron phosphate battery wind and solar hybrid power generation system

    Can a hybrid solar–wind power plant benefit from battery energy storage?

    This study aims to propose a methodology for a hybrid wind–solar power plant with the optimal contribution of renewable energy resources supported by battery energy storage technology. The motivating factor behind the hybrid solar–wind power system design is the fact that both solar and wind power exhibit complementary power profiles.

    Is battery energy storage a good choice for renewable power applications?

    Currently, battery energy storage technology is considered as one of the most promising choices for renewable power applications. This research targets at battery storage technology and proposes a generic methodology for optimal capacity calculations for the proposed hybrid wind–solar power system.

    Are LiFePO4 batteries good for solar applications?

    LiFePO4 batteries, renowned for their long cycle life, high energy density, safety, and environmental friendliness, have proven to be an ideal complement to solar systems. This article delves into the various aspects of LiFePO4 batteries in solar applications, exploring their working principles, benefits, challenges, and future prospects.

    Can a hybrid power plant containing wind and solar power mix match load demand?

    In this paper, a hybrid structure of a renewable power plant containing wind and solar generation mix coupled with an optimal BESS capacity has been proposed. This design is able to optimally match load demand at a particular region with the optimal renewable resource allocation at minimum cost.

    Should hybrid wind-solar power plants be integrated into electricity grids?

    Advantageous combination of wind and solar with optimal ratio will lead to clear benefits for hybrid wind–solar power plants such as smoothing of intermittent power, higher reliability, and availability. However, the potential challenges for its integration into electricity grids cannot be neglected.

    How to maintain the reliability of the proposed hybrid generation?

    In addition, the reliability of the proposed hybrid generation is maintained by the introduction of BESS and the set-up of the optimisation problem through ( 2) and ( 9 ), which keeps the generation–demand matching even in times of power deficit using the stored energy from the BESS.

  • Times using grid-side energy storage power station

    Times using grid-side energy storage power station

    Energy storage is one of the key technologies supporting the operation of future power energy systems. The practical engineering applications of large-scale energy storage power stations are increasing, an.


    FAQs about Times using grid-side energy storage power station

    What are the applications of grid side energy storage power stations?

    Further research directions Due to the important application value of grid side energy storage power stations in power grid frequency regulation, voltage regulation, black start, accident emergency, and other aspects, attention needs to be paid to the different characteristics of energy storage when applied to the above different situations.

    Are China's Grid side energy storage projects effective?

    Due to factors such as high prices of energy storage devices and imperfect market models, China's grid side energy storage projects are currently in their early stages, with limited engineering applications and a lack of evaluation methods of the actual operational effectiveness of power stations from multiple perspectives.

    How can energy storage power stations be evaluated?

    For each typical application scenario, evaluation indicators reflecting energy storage characteristics will be proposed to form an evaluation system that can comprehensively evaluate the operation effects of various functions of energy storage power stations in the actual operation of the power grid.

    Why do we need a grid-scale energy-storage system?

    Under some conditions, excess renewable energy is produced and, without storage, is curtailed 2, 3; under others, demand is greater than generation from renewables. Grid-scale energy-storage (GSES) systems are therefore needed to store excess renewable energy to be released on demand, when power generation is insufficient 4.

    Why are energy storage stations important?

    As the proportion of renewable energy infiltrating the power grid increases, suppressing its randomness and volatility, reducing its impact on the safe operation of the power grid, and improving the level of new energy consumption are increasingly important. For these purposes, energy storage stations (ESS) are receiving increasing attention.

    Are battery energy-storage technologies necessary for grid-scale energy storage?

    The rise in renewable energy utilization is increasing demand for battery energy-storage technologies (BESTs). BESTs based on lithium-ion batteries are being developed and deployed. However, this technology alone does not meet all the requirements for grid-scale energy storage.

  • Outdoor power box protection level

    Outdoor power box protection level

    Outdoor Sockets for Power Tools If you're installing outdoor sockets for using power tools in the garden or driveway, an IP66 rating provides excellent protection against powerful water jets, ensuring safety even during cleaning or heavy rainfall.


    FAQs about Outdoor power box protection level

    What are the most common IP ratings for outdoor equipment enclosures?

    The following are the most common IP ratings for outdoor equipment enclosures. Equipment that has been designed hardened for outdoor use will perform well in an enclosure rated to IP54. It will give a good level of protection from airborne dust and splashing rain. IP54 allows some ingress of water, subjectively defined as 'limited'.

    What IP rating do I need for outdoor applications?

    For outdoor applications, we generally recommend products with a minimum rating of IP44, but many situations require higher protection. Based on our decade of online experience and countless customer consultations, we've compiled the most commonly needed IP ratings for specific outdoor scenarios: IP44 - Suitable for: IP65 - Suitable for:

    Are outdoor electrical products safe?

    When you're working on outdoor electrical projects, choosing the wrong products can lead to dangerous failures, costly replacements, and unnecessary headaches. At Power Discount, we've seen countless customers confused about which electrical products are genuinely safe for outdoor use.

    Can NEMA enclosure ratings be mapped to IP Codes?

    Thus, while it is possible to map NEMA enclosure rating/NEMA ratings that can satisfy or exceed the IP Code criteria, it is not possible to map IEC ratings (IP codes) to NEMA enclosure ratings, as the IP Code does not mandate the additional requirements.

    Are outdoor sockets safe for power tools?

    Outdoor Sockets for Power Tools If you're installing outdoor sockets for using power tools in the garden or driveway, an IP66 rating provides excellent protection against powerful water jets, ensuring safety even during cleaning or heavy rainfall. These sockets typically feature robust gaskets and seals that maintain integrity over years of use.

    What is the international protection rating?

    Sometimes called the International Protection rating, it is defined by the International Electrotechnical Commission (IEC) under the international standard EN 60529 (British BS EN 60529: 1992 – Degrees of protection provided by enclosures - IP Code).

  • The role of power station generators

    The role of power station generators

    A power plant generator is a device that uses mechanical energy obtained from external sources to produce electricity. Multiple energy sources are used to turn the generator.


    FAQs about The role of power station generators

    What is the role of a generator in a power plant?

    Generator Role in Power Plants In the realm of power plants, generators serve as the backbone of electricity generation. These plants harness different energy sources, such as fossil fuels, hydro, wind, and solar, to turn the generators and produce electrical energy.

    What is a generator & how does it work?

    One of the critical roles of generators is to provide backup power during outages or emergencies. In various sectors, such as hospitals, data centres, and critical infrastructure facilities, uninterrupted power supply is paramount. Generators act as a reliable source of backup power, automatically kicking in when the primary power source fails.

    What is a power generator?

    What are Power Generators? Power generators are devices designed to convert mechanical energy into electrical energy, a process that lies at the heart of power generation. These machines are instrumental in meeting the ever-growing global demand for electricity, powering homes, industries, and various infrastructures.

    Why do power stations use diesel generators?

    Many power stations use diesel generators to power facilities with nuclear, natural gas, coal, hydro, or other sources of energy. These generators ensure a smooth flow of routine operations at power stations and act as a power backup during outages to keep the power stations running.

    What role do generators play in a broader energy infrastructure?

    Generators, equipped with intelligent control systems, will play a central role in integrating these innovations into the broader energy infrastructure. Additionally, the development of microgrid systems, where generators work in tandem with localised energy sources, holds promise for decentralised and resilient power generation.

    How do electric power stations work?

    Electric power stations use diesel-fueled generators for an internal combustion process that converts diesel's chemical energy into thermal energy to produce a mechanical action that generates electric power. Mostly diesel plants are used as supplementary or emergency sources of power rather than primary power sources.

  • Huawei Somalia Power Plant Energy Storage Project

    Huawei Somalia Power Plant Energy Storage Project

    The project involves the design, supply, installation, testing, and commissioning of a 10 MW solar photovoltaic (PV) plant integrated with a 20 MWh battery energy storage system (BESS) and a 33 kV evacuation line.


    FAQs about Huawei Somalia Power Plant Energy Storage Project

    Will Huawei fusion solar power Red Sea city's off-grid energy needs?

    Huawei's FusionSolar Smart String Energy Storage Solution will power the Red Sea City's off-grid, clean energy needs. The Red Sea Project, a key part of SaudiVision2030, is now the world's largest microgrid with 1.3GWh storage capacity.

    What is Huawei doing in Asia-Pacific?

    Meanwhile, in Thailand, Huawei built Asia-Pacific's largest single-site C&I PV and ESS plant at Mahidol University, including a 12 MW PV system and a 600 kWh ESS. “Huawei's smart string and grid-forming ESS solution significantly improves a power grid's ability to integrate renewable energy,” Xing explained.

    Is Huawei the leading solar inverter vendor in 2022?

    Huawei's dominance in the renewable energy sector is further evidenced by its position as the leading global solar photovoltaic (PV) inverter vendor in 2022, with a 29 percent market share, according to Wood Mackenzie.

    Will Saudi Arabia build a green economy center?

    The two parties will cooperate to enable Saudi Arabia to build a global clean energy and green economy center. This 1300 MWh off-grid energy storage project is the largest of its kind in the world and represents a milestone in the global energy storage industry. The NEOM Red Sea project has been listed as a key element in Saudi Vision 2030.

    What is Huawei fusionsolar smart string energy storage solution (ESS)?

    Central to this vision is Huawei's FusionSolar Smart String Energy Storage Solution (ESS). This solution will enable the Red Sea Project to independently meet its power needs. The microgrid solution addresses the intermittent and fluctuating nature of solar and wind power. It ensures the safe and stable operation of renewable energy systems.

    Why is Huawei involved in the Red Sea project?

    Huawei's involvement in the Red Sea Project underscores its commitment to sustainability, technological expertise, and collaboration. “The Red Sea Project provides an unparalleled opportunity to demonstrate this commitment and showcase our industry-leading innovation and technology,” said Xing. “It's a blueprint for sustainable cities.

  • Outdoor power supply plus water pump

    Outdoor power supply plus water pump

    1. Best Overall: VEVOR Deep Well Submersible PumpSpecs: 1. Horsepower: 1 HP 2. Power draw: 750 W 3. Volts: 230 V AC 4. Max flow rate: 37 GPM The VEVOR is a capable pum.


    FAQs about Outdoor power supply plus water pump

    Are there different types of water pumps for off-grid living?

    Fortunately, several types of water pumps are specifically designed for off-grid living. Each type has its advantages and considerations, depending on factors such as power source availability, budget, and desired water output. One of the most reliable and cost-effective options for off-grid living is the manual water pump.

    What is the best water pump for off-grid living?

    One of the most reliable and cost-effective options for off-grid living is the manual water pump. These pumps are typically operated by hand or with the use of foot pedals, allowing you to manually extract water from a well or other water sources.

    What is a solar powered water pump?

    Solar-powered pumps consist of photovoltaic panels that convert sunlight into electricity, which powers the pump. With minimal maintenance requirements and the ability to provide a reliable water supply when sunlight is available, these pumps are a popular choice among off-grid enthusiasts.

    Do you need a well pump for off-grid living?

    One of the most critical aspects of off grid living is finding a reliable source of water. Wells have been used by people in remote communities for millennia and are still a great source of freshwater. Once you've got a well, though, you still need to draw up water and put it to use. That's where water pumps and well pumps come into play.

    What is a submersible well pump?

    Submersible well pumps are the real workhorses of modern off-grid water. They're designed to fit within your well shaft and rest below the groundwater level. This allows them to push water up from the depths of your well rather than try to pull it from the surface. Submersible wells are by far the most efficient, affordable, and versatile.

    How do you Power an off-grid water pump?

    You can use a generator, solar power, or any number of sources to provide electricity to your pump. It just depends on how creative you want to get. Generators and solar systems are probably the most common ways to power an off-grid water pump. If you have panels, you may have to tweak your solar system to make it compatible with your pump.

  • Huawei Morocco Power Grid Energy Storage Project

    Huawei Morocco Power Grid Energy Storage Project

    Sealed by a Memorandum of Understanding (MoU) signed on July 18, in Rabat, the partnership seeks to harness innovative energy storage technologies to achieve widespread integration of renewable energies, indicated Huawei Morocco in a press release.


  • Do you need outdoor power supply when going to St Lucia

    Do you need outdoor power supply when going to St Lucia

    In Saint Lucia, power plugs and sockets (outlets) of type G are used. The standard voltage is 240 V at a frequency of 50 Hz. Yes, you need a power plug travel adapter for sockets type G in Saint Lucia.


    FAQs about Do you need outdoor power supply when going to St Lucia

    Do I need a travel adapter for Saint Lucia power outlet?

    It is important to determine if you need a travel adapter or a voltage converter for Saint Lucia plug and power outlets. Not to worry, we have all the information you need to ensure a problem-free trip. What type of plug is used in Saint Lucia power outlet? The power plug and outlet used in Saint Lucia is the Type G plug.

    What type of power socket do I need in Saint Lucia?

    The power sockets in Saint Lucia are of type G. The standard voltage is 240 V at a frequency of 50 Hz. You need a power plug (travel) adapter in Saint Lucia.

    What type of plug is used in Saint Lucia?

    Not to worry, we have all the information you need to ensure a problem-free trip. What type of plug is used in Saint Lucia power outlet? The power plug and outlet used in Saint Lucia is the Type G plug. Type G plug has three rectangular pins arranged in the form of a triangle.

    Do North Americans need an adapter in Saint Lucia?

    No! North Americans will need an adapter for the outlets and a transformer for the voltage when traveling to Saint Lucia. North Americans device plugs will not work with the outlet types in Saint Lucia. Also, the voltage in Saint Lucia is different from North American voltages. Can Europeans use Electronics in Saint Lucia without an adapter?

    Do Europeans need a transformer in Saint Lucia?

    Europeans do not need a transformer when traveling to Saint Lucia. The voltage in Saint Lucia is the same as in Europe. However, most Europeans will need a travel adapter when traveling to Saint Lucia. What Outlet does Saint Lucia Use? Type G plug sockets have three rectangular pins and a grounding pin.

    How is electricity generated in Saint Lucia?

    Electricity in Saint Lucia is heavily generated from fossil fuels. About 99% of Saint Lucia's electricity is generated from fossil fuels, with solar energy accounting for 1% of electricity generation. Here's all you need to know about Saint Lucia plug, power outlets, travel adapter needed for sockets, electricity voltage, and frequency.

  • What are the commercial energy storage power sources

    What are the commercial energy storage power sources

    Energy storage technologies include batteries, pumped hydro storage, thermal storage, and others, each with its own specific advantages and benefits.


    FAQs about What are the commercial energy storage power sources

    What are commercial energy storage systems?

    Commercial energy storage systems provide a pivotal mechanism for capturing energy generated during periods of low demand and disbursing it during times of high demand. To gain a deeper comprehension of these intricate systems, it is imperative that we delve into their underlying components.

    Why should a commercial energy storage system have a PCs?

    The PCS not only enhances the flexibility and efficiency of the system but also ensures a smooth and stable power supply, making it an essential element in the overall architecture of a commercial energy storage system.

    What are energy storage systems?

    Energy storage systems play a critical role in balancing the supply and demand of energy, especially for intermittent renewable sources like wind and solar power. Energy storage technologies include batteries, pumped hydro storage, thermal storage, and others, each with its own specific advantages and benefits.

    Why do businesses need commercial energy storage systems?

    As businesses increasingly prioritize sustainability and efficiency, commercial energy storage systems, such as solar battery solutions and grid-scale storage, are becoming essential components of energy management strategies.

    What are the benefits of commercial power storage?

    Some of the advantages of commercial power storage include: The benefits of installing battery storage at your facility can be great; however, one must evaluate the total cost of ownership of an energy storage system to determine if it's a good fit. Let's explore the costs of energy storage in more detail.

    Are commercial energy storage systems becoming more affordable?

    As technological advancements continue and regulations increasingly favor their adoption, commercial energy storage systems are experiencing rising acceptance and becoming more affordable.

  • Yeti energy storage power supply

    Yeti energy storage power supply

    A simple, affordable solution for backup power, our Yeti Home Backup System is made of a portable power station, an integration kit to connect to your breaker panel, and optional expansion batteries for even more power.


    FAQs about Yeti energy storage power supply

    What is a Yeti X 600W power supply?

    Yeti X 600W Power Supply is also a replacement power supply for the Yeti 6000X. COMPATIBILITY: Compatible with Yeti X Power Stations 1500X and larger. Not compatible with Yeti Lead Acid, Yeti Lithium or the Yeti 200X/500X Power Stations. CHARGE TIMES: Goal Zero Yeti 1500X: 3 hrs, Goal Zero Yeti 3000X: 6 hrs, Goal Zero Yeti 6000X: 12 hrs

    What is a Yeti backup power system?

    Complete your ecosystem with portable solar panels and recharge your system from the sun. With a Yeti Backup Power System, you get a clean, quiet source of power that keeps you and your home running. Perfect for those shorter outages, plug your fridge, laptop and WiFi router in and skip the blackouts. Ideal for small homes and apartments.

    How much power does a Yeti 1500x have?

    Same page link. Keep the essential in your home running with the Yeti 1500X and upgraded 600-Watt Power Supply. This bundle delivers about 1,516 Watt Hours of backup and sets you on your way to building a custom home energy system. Recharge your Yeti 1000X or larger up to five times faster with this 25A AC power supply.

    Can you add solar panels to a Yeti 6000x?

    Simply add solar panels to recharge and have endless power. Select one of our award-winning power stations from a Yeti 1500X up to a Yeti 6000X. Expandable storage allows you to increase capacity to meet bigger power needs. Integrate and power your circuit panel for emergency power at the flip of a switch.

    How much backup power does a Yeti 3000X have?

    Increase your amount of backup power with Yeti Tank Expansion Batteries. With zero emissions and always at the ready, expansion tanks are the easiest way to make sure you always have enough power. With 5400Wh of battery storage capacity this expanded Yeti 3000X home backup system can give you 1.5 days of runtime when you need it most.

    How do I charge my Yeti 1500x/3000x?

    FAST CHARGE: Fast charge your Yeti 1500X/3000X with our new Yeti X 600W Power Supply. This 600W power supply will charge up a Yeti 1500X in 3 hrs and a Yeti 3000X in 6, giving you the power you need in a fraction of the time.

  • Current status of wind power construction of communication base stations in Belarus

    Current status of wind power construction of communication base stations in Belarus

    This study analyzes the development of wind energy in the Republic of Belarus and the factors which have influenced that process. Being a landlocked country, Belarus has only onshore wind potential but was.


Solar Mounting & Structural Insights