Cold light
The use of high-frequency fluorescent lights has become a viable option both in studios and on location. The merits of such lights compared to tungsten are:
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greater efficiency, or more correctly efficacy, producing 3 to 4 times more light than tungsten sources. Tungsten halogen produces 25 lumens/watt, whereas fluorescent lamps, depending on type, can produce up to 100 lumens/watt. |
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no radiant heat in the light beam, unlike tungsten sources which radiate typically 55% of lamp power in the beam. This means the artistes are more comfortable under cold light sources. |
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fluorescent luminaires usually use several lamps to produce a practical light source, hence they are soft sources, i.e. not point sources. This results in less ... |
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