lighting

[SEA-SALTED]

hey folks, i need advise as to the distance that mh lighting should be from the top of the water. I have 2 175watt mh and the tank is 26 inches deep, 5feet long. any input would be helpful. thsnks for your time, Patrick

 

[SEA-SALTED]

I also should add that i am new at the mh thing. Thanks