Thursday, February 11, 2010

Do clear light bulbs give off more heat than soft light bulbs?

I'm using light bulbs for light as well as a heat source. Thanks!Do clear light bulbs give off more heat than soft light bulbs?
The actual amount of heat given off by these bulbs would be the same, but the way they distribute it would be different.





The clear bulb would radiate more heat in the form of radiant heat - infrared radiation - which goes off in all directions, the frosted glass of the soft bulbs would absorb most of this heat, and then would give off that heat from right at the surface of the frosted glass. That heat would then transfer to the surrounding air, and travel upwards in a fairly narrow column as a convection current.





Of course, you also get more light from a clear bulb, too, even if it is a bit ';harsher';.





So if you wanted to spread the heat as much as possible, use a clear bulb.Do clear light bulbs give off more heat than soft light bulbs?
You are confusing the glass with the filament. The heat given out by an incandescent filament is a function of temperature only, has nothing to do with the glass bulb.





Look at the color temperature of the 2 bulbs and read http://en.wikipedia.org/wiki/Black_body


You can figure out the answer yourself.

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