Mine gets so hot that I had to put a fan blowing straight on it. Without the fan it was raising the temp of the water and making it very hot in my stand. I added the fan blowing right on the back from about 1.5" away and its helped it out a lot. I was afraid of driling holes in it because of the humid salty air in the stand. I probably should drill a few anyway.
My two cents anyway. Btw I have coralline growing great under this light in my refugium, didnt expect it to grow so well down there. My refugium is 32g.
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