Lightning
Cove lighting is a form of indirect lighting built into ledges, recesses, or valances in a ceiling or high on the walls of a room. It directs light up towards the ceiling and down adjacent walls, It may be used as primary lighting, or for aesthetic accent, specially to highlight decorative ceilings.
Fluorescent light.- is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow. Fluorescent bulbs are more efficient than incandescent bulbs.
Natural lightning.- Sunlight is a portion of the electromagnetic radiation given off by the Sun. on Earth, sunlight is scattered and filtered through Earth's atmosphere and is obvious as daylight when the Sun is above the horizon.
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