How far are your T5s from water surface?

[snookface1]

4"

Went from VHO to T-5 and my tank temp droped from 81 to 78.

 

[Perureef]

3 1/2"

 

[Alaskan Reefer]

10" -- but I'm only keeping softies / LPS on that part of the tank. Ideal in my opinion is 4-5 inches...