[Sven]

I have a 160g tank which is 21,6" tall. I´m planing on filling it with anubias and moss. I´m hanging a light fixture over it with 4 39W T5´s. Now I don´t whant the light to be to bright since I dont whant the anubias to be covered in algae. I wont be using reflectors on the lights, how high should I hang them in order to minimize algea growth? Should I maybe only be using 2 39W T5´s? I thought that would be a bit low for a tank that size.

 

[FSM]

By not using reflectors you're basically cutting the output by 1/3. Why bother with the added expense of T5s, plus the waste of energy?

 

[BottomFeeder]

With reflectors it is probably still a low light tank. I wouldn't think you would have any algae problems unless you left the lights on way too long.

 

[Sven]

Good deal, FSM, I already had the electronic ballasts and I won´t notice a big difference in the electric bill, that stuff is pretty cheap here in the land of fire and ice.
I´ll see about clipping the reflectors on later if the lighting will bo to low.