Radion led question
 

I just bought two ecotech radions for my 36 x 36 by 24 cube tank is Tia enough light and how high can I put them from the water to het full penetration I have them about 8 inches but it's like I don't get full coverage just in the middle

They will cover a 24"x24" footprint, so two cover a 48"x 24" nicely..two may not cut it on a 36" wide tank.

You may need to just go a little higher, and maybe spread them out a little further from each other. 2 should be more than enough for that size tank.

I am still waiting for mine to show up & test them on my 120