A lamp that produces light by heating up a filament of wire inside a bulb with an electric current. Because the filament, usually made of tungsten, would burn from the heat, the bulb is filled with a nonreactive gas, such as argon, which protects the wire from burning. Comparefluorescent...
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aTo ease this change, bulbs will be described in yet a third way. A 60-watt bulb, for example, will send out as much light as the old 60-watt incandescent lamp. 要缓和这变动,电灯泡将被描述在,第三个方式。 60瓦特电灯泡,例如,将派出同样多光象老60瓦特白炽灯。
light bulbsTo understand how time and temperature could affect latent fingerprints, wooden pallets were used to construct five units that each housed ten 60‐watt incandescent light bulbs. Fingerprints were deposited on the top, middle, and base of the globes. The bulbs were powered on (except...
They are more than four times more efficient than incandescent bulbs. For example, one 100-Watt incandescent light is equal to at least four 25-Watt CFLs. CFLs were cheaper to use than incandescent lights despite their high initial cost. CFLs don’t have a carbon footprint therefore, they ...
Incandescent (Inc) bulbs provide light energy, but much of it is electrical energy with a light efficiency of approximately 8-24 lumens per Watt and a rated life of approximately 750-2000 hours (Darre and Rock, 1995). The use of light-emitting diodes (LEDs) in broiler production has ...
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20、Standardincandescentlamps will most likely not be able to meet those requirements.(普通白炽灯极可能无法满足这一要求;) 21、A decent 60-wattincandescentcosts less than a dollar.(一个好看的60瓦白炽灯还不到1美元。) 22、The old kind are calledincandescentlight bulbs and once upon a time they...
With regard to LED bulbs, these are still prohibitively expensive for most applications. This year, Osram-Sylvaniaunveileda prototype LED that puts out the same amount of light as a 100-watt standard incandescent. Pricing is not yet available, but the 60-watt equivalent of this bulb currently ...
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