how high should my t5 be?

[nissan577]

i have a 95g wave tank
L 48 x W 25 x H 24
i have a 4 ft tek light fixture 8 bulb t5HO set
Front to back
ATI blue plus
ATI aquablue special
ATI blue plus
ATI purple plus
ATI blue plus
ATI blue plus
ATI aquablue special
ATI blue plus
how high should i have my t5 fixture hanging over my tank from the surface?
so far i have a 20 or so sps and ima make it a dominate sps only. so i wanna get a good amount of light everywhere.

 

[nikesb]

for your height of a tank, i would put it at 6" above the water surface. you can get more light penetration by running a carbon reactor to make the water clearer.