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  2. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    An LED holiday light. Light-emitting diode (LED) holiday lights are quickly gaining popularity in many places due to their low energy usage, long lifetime, and associated low maintenance. Colored LEDs are far more efficient at producing light than their colored incandescent counterparts.

  3. Solar street light - Wikipedia

    en.wikipedia.org/wiki/Solar_street_light

    A solar street light in British Columbia, Canada. The solar panel is one of the most important parts of a solar street light, as the solar panel can convert solar energy into electricity that the lamps can use. There are two types of solar panels commonly used in solar street lights: monocrystalline and polycrystalline. The conversion rate of ...

  4. Solar still - Wikipedia

    en.wikipedia.org/wiki/Solar_still

    In a solar still, impure water is contained outside the collector, where it is evaporated by sunlight shining through a transparent collector. The pure water vapour condenses on the cool inside surface and drips into a tank. Distillation replicates the way nature makes rain. The sun's energy heats water to the point of evaporation.

  5. Solar thermal collector - Wikipedia

    en.wikipedia.org/wiki/Solar_thermal_collector

    The term "solar collector" commonly refers to a device for solar hot water heating, but may refer to large power generating installations such as solar parabolic troughs and solar towers or non-water heating devices such as solar cookers or solar air heaters. [1] Solar thermal collectors are either non-concentrating or concentrating.

  6. Solar-assisted heat pump - Wikipedia

    en.wikipedia.org/wiki/Solar-assisted_heat_pump

    The operating conditions' optimization of this system is the main challenge, because there are two opposing trends of the performance of the two sub-systems: by way of example, decreasing the evaporation temperature of the working fluid increases the thermal efficiency of the solar panel but decreases the performance of the heat pump, and consequently the COP. [4]

  7. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    The pressure vessel is a seamless cylinder normally made of cold-extruded aluminum or forged steel. [5] Filament wound composite cylinders are used in fire fighting breathing apparatus and oxygen first aid equipment because of their low weight, but are rarely used for diving, due to their high positive buoyancy.

  8. Where to buy solar eclipse glasses and how to know if they're ...

    www.aol.com/lifestyle/solar-eclipse-glasses-2024...

    Before 2017, it had been more than three decades since the last total solar eclipse was visible from the U.S. in 1979. But just because this once-in-a-lifetime event is happening twice within a ...