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  2. Solar-powered calculator - Wikipedia

    en.wikipedia.org/wiki/Solar-powered_calculator

    Solar-powered calculators are hand-held electronic calculators powered by solar cells mounted on the device. [1] They were introduced at the end of the 1970s. [2]Amorphous silicon has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to conventional crystalline silicon solar cells is ...

  3. Solar-powered flashlight - Wikipedia

    en.wikipedia.org/wiki/Solar-powered_flashlight

    Other models include features such as a solar cell phone charger, [6] an AM/FM radio, or a siren to call for help in an emergency. Some models include a hand crank dynamo for charging at night. [7] An experimental solar flashlight the size of a credit card features a white LED powered by 16 solar cells. [8]

  4. Solar lamp - Wikipedia

    en.wikipedia.org/wiki/Solar_lamp

    A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.

  5. Solar street light - Wikipedia

    en.wikipedia.org/wiki/Solar_street_light

    The energy consumption of an LED fixture is at least 50% lower than the HPS fixture counterpart which is widely used as the lighting source in traditional street lights. A lack of warm-up time in LEDs also allows for use of motion detectors for additional efficiency gains.

  6. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    As of 2010 some LED lamps replaced higher wattage bulbs; for example, one manufacturer claimed a 16-watt LED lamp was as bright as a 150 W halogen lamp. [71] A standard general-purpose incandescent bulb emits light at an efficacy of about 14 to 17 lm/W depending on its size and voltage. (Efficacy of incandescent lamps designed for 230 V ...

  7. Electric light - Wikipedia

    en.wikipedia.org/wiki/Electric_light

    An electric light, lamp, or light bulb is an electrical component that produces light.It is the most common form of artificial lighting.Lamps usually have a base made of ceramic, metal, glass, or plastic which secures the lamp in the socket of a light fixture, which is often called a "lamp" as well.

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