A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce light. The arc discharge is generally confined...
23 KB (2,776 words) - 23:04, 30 July 2024
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric...
96 KB (11,335 words) - 16:31, 28 September 2024
A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties...
27 KB (3,186 words) - 14:45, 23 August 2024
high-intensity discharge (HID) gas discharge lamp. Developed in the 1960s, they are similar to mercury vapor lamps, but contain additional metal halide compounds...
23 KB (2,978 words) - 09:12, 15 September 2024
for the average incandescent lamp was $280; for mercury vapor lamps, it was $128; and for low-pressure sodium vapor lamps, it was $60 a year. Meanwhile...
28 KB (3,262 words) - 03:58, 15 August 2024
Varieties of HID lamp include: Mercury-vapor lamps Metal-halide (MH) lamps Ceramic MH lamps Sodium-vapor lamps Xenon short-arc lamps The light-producing...
18 KB (2,133 words) - 09:40, 27 September 2024
American electrical engineer and inventor, who invented the first mercury-vapor lamp in 1901. Hewitt was issued U.S. patent 682,692 on September 17, 1901...
21 KB (1,815 words) - 17:11, 9 June 2024
Low-pressure mercury lamps High-pressure mercury lamps Excimer lamps LEDs Low-pressure mercury lamps are very similar to a fluorescent lamp, with a wavelength...
8 KB (988 words) - 04:05, 12 July 2024
metal vapor. The usual metals are sodium and mercury owing to their visible spectrum emission. One hundred years of research later led to lamps without...
30 KB (3,316 words) - 05:16, 9 September 2024
Mercury-vapor lamps and sodium vapor lamps produce light from atoms in excited states. Flammable liquids do not burn when ignited. It is the vapor cloud...
7 KB (753 words) - 15:21, 9 June 2024