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Old 09-12-2012, 10:59 PM   #1
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Can I dim LEDs if supposedly "non-dimmable"?

Hey folks. It is good to be on Aquaruim Advice. This is my first time on a forum for many years.

I just started my first aquarium ever, 75 gallon reef tank with a 30 gallon refugium thanks to my brother's help. I recently purchased a 48 inch "Green Element Evo" fixture from aquatraders.com which has 64 LEDs at 3 watts each. Here is a link for the fixture:
EVO Quad 48 LED Reef Bright
I was interested in using a dimmer switch for the LEDs; howerver, the support at aquatraders said these lights could not be dimmed. I heard on a podcast that someone came up with a dimmer for T5 fixtures. What would happen if I used a dimmer switch or a less powerful power supply for my LED fixture? Serious problems? Would the fixture just not work? I would appreciate any help you all could give.
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Old 09-13-2012, 04:48 PM   #2
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Yes you can dim the LEDs but you will have to use an external dimmer. They have the plug and play ones at Home Depot or Lowes in the lighting section.
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Old 09-14-2012, 11:40 PM   #3
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dimmers on the market

I asked the tech support at aquatraders if an external dimmer could be used and they said, "no." Still, it would not suprise me if it worked just fine. Here is one I found online for under $8. Is this the kind you saw at Home Depot? Thanks for the help!
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Old 09-16-2012, 04:49 PM   #4
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BS! Power is power. Check the minimum power ratings if the LEDs just in case, but I am using LEDs on my 75 gal Amazon tank with a dimmer, and I have no problems. The slider or dial dimmer will work best. Just make sure you get a plug and play dimmer that plugs into the wall, and plug your fixture into it and presto...... you have the ability to dim LED lights.
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Old 11-06-2012, 10:14 PM   #5
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FYI, I purchased the dimmer & the Aquatraders was right. These LEDs cannot be dimmed. Anyone want a used dimmer for $10. It was only used once.
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Old 11-06-2012, 10:35 PM   #6
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I have LEDs on my tank and I can dim them. Did you get the dimmer with the slider control? I go from the wall to the dimmer switch and out to the LEDs...no problem.
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Old 11-06-2012, 10:47 PM   #7
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If you google "can I dim LED lights" you will see that it is quite possible. It will not dim the same as a regular light bulb because of the operating voltage, but they will dim all the same.
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Old 11-07-2012, 11:45 PM   #8
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I did get the slider type dimmer. Perhaps it did not work because these are cheaper LEDs. The dimmer was only about $15.
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Old 11-08-2012, 05:31 AM   #9
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greetings.

perhaps it's because of the controller in the LED mounting? it blocks off when it receives less than pre-set voltage?
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Old 11-08-2012, 11:33 PM   #10
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It was wierd and interesting- as I slowly pushed the slider switch, the LEDs turned instantly on when there was enough energy to reach its threshhold for necessary watts/volts (whatever).
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