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tinstaafl's avatar
tinstaafl
Explorer
Jun 14, 2013

LEDs replaced florescents but get hot

I bought 28 "48SMD LED Light panels)to convert the 12 Volt lights to LEDs. So far I have converted two florescent fixtures, removing all the florescent components, circuit board, etc., and sticking the LED panels to the fixture housing and then replacing the fixture lens cover.

Everything works fine except that the LEDs are giving off a great deal of heat. I thought that the LEDs would be extremely efficient since all the consumed energy converts to light, not heat. That does not appear to be the case as there is a lot of heat being produced. Removing the lens cover from one of the fixtures I cannot keep my hand on the 48 LED panel because it is too hot.

I bought these LEDs on E-Bay for $2.75 each. Are these just cheap (crummy) LEDs or are they supposed to be that hot? At this point I'm not sure I want to convert the rest of my fixtures.

Thanks in advance for whatever comments or suggestions you might offer me.
  • Sounds like the ones I have. Mine are cool up to 12.6 Volts but get pretty hot at a volt or two higher. It isn't a problem for me because we always boondock without a generator. Otherwise I would need to regulate the voltage. You can get a magic box regulator for about $3 on ebay that holds the voltage at 12 for several amps or a small 12 V regulator component for one light for fifty cents.
  • Heat is not good for any LED. They will last longer when htey run cooler.

    Yet to get more brightness, sometimes the manufacture sets up the LED to run more amperage, and that will also cause more heat, thus lower lifespan.



    Fred.
  • If you bouight the water proofed ones they have a rubbe coating and do get warm to the touch. If you run your fingers over uncovered ones you can feel the sharpness of the lens. The rubber coated ones are smooth but as you say get hot.

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