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LIghting Loads

LIghting Loads

LIghting Loads

(OP)
When calculating the heat load from room lighting, what is the conversion from foot candles to Watts/Sq. Ft?

RE: LIghting Loads

I don't believe there is an exact conversion because foot candles measure the intensity of the light and some fixtures/bulbs are more efficient than others.

RE: LIghting Loads

(OP)
If foot candles is a measure of intensity, how can it be used to calculate lighting heat load.  Wouldn't Watts/Ft^2 be the more sensible choice?

RE: LIghting Loads

new2 has hit it on the head.

There is no conversion because foot candles and watts are are fundamentally different quantities.

Foot candles are a measure of lighting intensity.  Watts are a measure of power.

The amount of power required to produce a foot candle of illumination is a function of the type of light source being used.  There is no "global" conversion factor.

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