Neon lamp
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A neon lamp is a miniature gas-discharge lamp. The lamp typically consists of a small glass capsule that contains a mixture of neon and other gases at a low pressure and two electrodes. When sufficien
NE-2 type neon lamp powered by alternating current (AC)
A General Electric NE-34 glow lamp, manufactured circa 1930
Switch on a power strip, illuminated by a neon lamp
+DC (left), -DC (center), AC (right) supplied to NE-2 type neon lamps
Metal-halide lamp
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A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides. It is a type of high-intensity discharge gas discharg
Metal halide lamp with arc tube shield, for open fixtures
Metal halide floodlights at a baseball field
Metal halide lamp for automotive headlights
Metal halide lamps were invented by Charles Proteus Steinmetz in 1912 and are now used in almost every city in the world.