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Halogen sealed-beam headlamps appeared on U.S. cars in 1979, to enable greater high beam intensity newly permitted by Federal Motor Vehicle Safety Standard 108 without unreasonably high lamp wattage. Eventually, halogen sealed-beam lights came to dominate the (U.S.) automotive lamps market.
The first high efficacy mains voltage halogen reflector lamp, whose 30% energy savings allow the 50W GU10 lamp to be replaced by an efficient 35W alternative with no loss of light. 2011 — RefLED ES50 350lm
In the 1970s, 34-watt energy-saving F40T12 fluorescent lamps were intoroduced in the United States. In the 1980s, T8 32-watt lamps were introduced, [8] but unlike the T8 tubes introduced in Europe, these T8s are not retrofits and require new matching ballasts to drive them. These ballasts were originally magnetic, but most today are electronic.
Standard and higher-wattage versions available with halogen burner S1 BA20d 2 6 V & 12 V: 25 / 25 W for motorcycles Gas discharge lamps.
"No" sticker [clarification needed] —600 watts (MH/HPS)—Lamps for commercial or industrial lighting are so rare that there isn’t any NEMA sticker. Most 600 watt HPS lamps are used for growing. Most 600 watt HPS lamps are used for growing.
A 300 watt tubular halogen bulb operated at full power quickly reaches a temperature of about 540 °C (1,004 °F), while a 500 watt regular incandescent bulb operates at only 180 °C (356 °F) and a 75 watt regular incandescent at only 130 °C (266 °F).
A CFL has a higher purchase price than an incandescent lamp, but can save over five times its purchase price in electricity costs over the lamp's lifetime. [1] Like all fluorescent lamps, CFLs contain toxic mercury, [2] which complicates their disposal. In many countries, governments have banned the disposal of CFLs together with regular garbage.
lumen per watt: lm/W: M −1 ⋅L −2 ⋅T 3 ⋅J: Ratio of luminous flux to radiant flux: Luminous efficacy (of a source) η [nb 3] lumen per watt: lm/W: M −1 ⋅L −2 ⋅T 3 ⋅J: Ratio of luminous flux to power consumption Luminous efficiency, luminous coefficient V: 1: Luminous efficacy normalized by the maximum possible efficacy See also:
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