I have had a basic understanding of LED lighting watts, lumens, and Kelvins for some time. I can usually figure out what lights I need in a given situation or use.
Now, I have a different problem. I have a small bathroom that the old incandescent lights made hotter (as in real temperature) after about 15-20 minutes. I switched to the least expensive non-dimmable LED lights I could find and it made it a lot better. However, they still noticeably heat the room more than normal after about 40 minutes. Does someone have, or have you seen a chart that will compare watts, lumens, Kelvins, and actual physical temperature?
**I’m currently using 3 GE 430 lumen, 5 watts, at 2700K.** (So called 40 watt equivalent) They are the standard screw in base with what feels like a ceramic coating that comes up about 1.5 inches above the screw thread. The bulb stays cool, but the coating at the base gets hot enough that you don’t want to touch it after about 10 minutes and begins to give off noticeable heat after about 30 minutes.
**I know all these lights will produce some heat**, but I would like to find something similar that does not heat up quite so much. Even with the bath fan running, you can feel the heat from these lights (they are in a light bar over the mirror) when you are in front of the mirror for very long.
In: Technology
No chart is required. Simple physics will tell us that the total heat produced by a bulb, including absorbed light, will be exactly equal to the energy consumed by the bulb. That 5 watt bulb will produce 5 watts of heat, or 1/8th that of the incandescent bulb it replaces.
Color temperature refers to the color of the light in reference to the color produced by heating any material to that temperature. Heat something, a tungsten filament or anything else, to 2700 Kelvin and it will emit light mostly of that color.
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