How much light?

[jetlink82]

I just put 2 Evergrow D120 Dimmable Leds over my 90 gallon about a week ago. I am trying to figure out how much light to use. Right now I just have some Xenia and some Zoa's in there, will add more coral next week.

At the moment I have the blue turned all the way up, the other knob with the white, blue, red, green, and UV is currently at 50% Does this sound right or should it be turned down a bit. I know every tank is different.

 

[ringo®]

I think you're wandering into death ray zone.

 

[jetlink82]

ok, is there any average setting that most use or is it just mess around with it and figure it out?

 

[dylpik27]

I have two 120W value fixtures from Reefbreeders (very similar to yours). Over 6 months, I gradually increased the intensity to where it is now. Currently, I run my blue channel at about 85-90% for 11 hours a day and my white (violet, red, etc.) at 50-55% for 9 hours a day.
I keep a mixed reef, but at least half of it is sps.
Hope that helps.

I also have a 90.

 

[ringo®]

Jetlink82;929195 wrote: ok, is there any average setting that most use or is it just mess around with it and figure it out?

Depends on the optics and the height of the fixture.

 

[jetlink82]

dylpik27;929197 wrote: I have two 120W value fixtures from Reefbreeders (very similar to yours). Over 6 months, I gradually increased the intensity to where it is now. Currently, I run my blue channel at about 85-90% for 11 hours a day and my white (violet, red, etc.) at 50-55% for 9 hours a day.
I keep a mixed reef, but at least half of it is sps.
Hope that helps.

I also have a 90.

Thanks, that does help. For now I have them set at 50% blue and about 20% white, red etc.

I have 90 degree lenses and they are about a foot off the water surface

 

[dylpik27]

I don't run optics on mine b/c mine are only about 6-8" off the surface and I wanted more spread.


Forgot to mention: I borrowed a PAR meter and my PAR at the surface and centered under the light is about 750 and ranges from 175-250 on the bottom.