What percentage to run led

[Dogbed]

Hello I need help. I have a 120 W ever grow LED on a 60 gallon cube I have already bleached a couple corals. I'm looking for advice on what percentage to run the blue and what percentage to run the white. Right now I have the blue at 100% and the white at 30%. I like the way it looks but I don't know if it's good for my corals.

 

[Alexm8856]

Way to much that why you bleaching turn down blues 70%
See how corals react you should par the lights

 

[lnevo]

You're probably getting something like 350 PAR in the center of the aquarium at the sandbed and probably like 1100 at the waterline. You're most likely cooking your coral. How long is your photoperiod? These are pretty powerful lights. I took PAR measurements on my D120s you can see the results here...

http://www.manhattanreefs.com/forum...08-evergrow-d120-par-measurement-results.html

I was not able to get directly under the light so my estimates over there are estimates based on what I saw. The results are pretty linear and equal between blue and white. So you can just add up the total percent to get an estimate of where you are on the scale.

Definitely start low and raise them up a little per week. If you're already seeing bleaching you've answered your own question if it's good or bad for your coral. Scale it back and be gentle. I asked already, but how long is your photoperiod.

 

[Dogbed]

I start out with this light no other how long should they be at that intensedy.

 

[lnevo]

How old is the tank what corals do you have where are they placed. Have any pictures? How high is the light. You told me in PM they ramp up and down. How long does the ramp up/down take?

 

[vashawn]

I have 4 of these lights on my 265 gal. I have the white 75% and blue 50%
so far no problem.

 

[BAD FISH]

Both are at 70% but I start everything on the sand bed and slowly move them up. if these are new lights. over an established tank start at 30% and slowly increase. the intensity week by week