How do I know if its too much light?

[Salty_Box_Reef]

I just put a evergrow fixture on my 14g biocube(w/90deg lenses), and from what I can tell over the last five days, my corals love it. My zoas open up every polyp, when before under my kessil they would have a couple per colony that stayed closed about 80% of the time, and my frogspawn lets loose a substancial amount more as well.

I hung it kind of high and I started out with the blue channel being ramped up to a max of 30%, and the white channel only up to 20% the first two days. then yesterday I went up to 40% on the blue, and 25% on the white. Today I'm at 40%B/30%W. Looks wise I would like to lower the fixture a few inches, and be around 60%B/40%W, but Im wondering what signs I should be looking for that would tell me its too much light for my little tank?

 

[mike007]

Corals will sart closing up and possibly start bleaching out. Also your tank temps may go up also. If it is doing good now why change it?

 

[Salty_Box_Reef]

Corals will sart closing up and possibly start bleaching out. Also your tank temps may go up also. If it is doing good now why change it?

Mostly for looks as I would like it to be a bit brighter for my tastes. I would also like to get to the point where my lights will support SPS's and I don't know if they will at lower levels.

 

[mike007]

It all depends on what corals you plan on keeping. Some do better under low light and others (sps) prefer the brighter light. But you have to make sure you have the correct spectrum. Most leds out there will give you what you need and most companies will help you with proper selection for your size tank.