Optic Question Rapid LED Atinic Retro

[tdb320reef]

Question -

My tank is 96X26HX 30 W

I will be installing 4 Rapid LED actinic Retrofit kits along with MH and T5's. About 96 Cree Royal Blue 2.5W ea.

They will be nested between T5 Retrofit and a bout 10" from the water line.

The front strip will be at the sand bed 36" down and the back will be in the rock work about 18-24"

60 Degree optics or 80 Degree optics? They will all be royal blue. Clear or Frosted optics?

Thanks.

 

[oltrevf]

As I understand it you can use pretty simple trig to estimate the light spread from different optic and mounting heights. I made a quick spread sheet to help me choose. I can share it with you tomorrow if you'd like.