12V DC UL transformer very hot
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Old 05-26-2014, 03:46 AM   #1
Algae Grower
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12V DC UL transformer very hot

Hi I have 2 4005 18"-24" Satellite LED+ fixtures which I connected to a dual ramp timer. The 12V DC UL transformer is very hot to the touch when the lights are in use. Since I bought 2 of these lights I tried both 12V DC UL transformers, which resulted in the same result. I am concerned about the safety of the transformer. From the information I gathered from your forum the dual ramp timer handles up to 48 watts at 12VDC. This means: Max. watts per channel at 12VDC = 24 watts. Given the wattage of each fixture is 13 watts the 12VDC transformer should suffice. The transformer is so hot that if I were to keep my hand on the transformer for an extend period of time I would end up with a burn. Is it possible to run your 24VDC transformer with this setup, and if so would it result in less heat from the transformer? Or is there something not working correctly?
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Old 07-15-2014, 10:30 PM   #2
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The transformers usually do run warm but should not burn. Some ventilation may help.

Do the run 24V power supplies on 12V LEDs, that can cause major issues.
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