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Carbon button lamp - The carbon button lamp is a single-electrode incandescent lamp invented by Nikola Tesla during his effort to get around the Edison patent for the incandescent light bulb. A carbon button lamp contains a small carbon sphere positioned in the center of an evacuated glass bulb.
Black light - Black light is the common name for a lamp emitting almost entirely long wave ultraviolet radiation and very little visible light. Fluorescent black lights are typically made in the same fashion as normal fluorescent lights except that only one phosphor is used and the normally clear glass envelope of the ...
Mercury-vapor lamp - A Mercury-vapor lamp is a gas discharge lamp which uses mercury in an excited state to produce light. The arc discharge is generally confined to a small fused quartz tube mounted within a larger borosilicate glass bulb.
Metal halide lamp - Metal halide lamps are similar to mercury vapor lamps, but instead of just mercury, they also contain sodium/scandium iodide and sometimes metals in the rare earth period combined with halogens in the halogen group of the periodic table. They are preferred over mercury vapor in areas where color rendition is important as they give a purer white light than mercury vapor, which tends towards the blue end of the electromagnetic spectrum
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