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These common lighting qualms have to do with the color temperature of the light bulbs. While many people may look at wattage (i.e., the amount of energy that a bulb uses to produce light) before ...
An incandescent lamp's light is thermal radiation, and the bulb approximates an ideal black-body radiator, so its color temperature is essentially the temperature of the filament. Thus a relatively low temperature emits a dull red and a high temperature emits the almost white of the traditional incandescent light bulb.
Under ECE regulations, H1 lamps are required to emit white or selective yellow light. [1] U.S. regulations require H1 lamps to emit white light. [2] Under both ECE and U.S. specifications, the allowable range of white light is quite large; some H1 lamps have a slight blue or yellow tint to the glass yet still produce light legally acceptable under the requirement for white light.
Light sources for vehicle lamps other than headlamps are not Federally regulated. In Canada, vehicle headlamps may use light sources (bulbs) conforming to either the US or the international ECE regulations. [8]: 108(5)(a)
[citation needed] Yellow light was obtained by dint of yellow glass for the headlight bulb or lens, a yellow coating on a colourless bulb, lens, or reflector, or a yellow filter between the bulb and the lens. [66] Filtration losses reduced the emitted light intensity by about 18 percent, which might have contributed to the reduced glare. [67]
English: Kelvin Temperature Chart of common light sources. Date: 25 September 2009, 20:55 (UTC) Source: ... File:Kelvin_Temperature_Chart.jpg licensed with PD-self
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).
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