how high to hang halides

[Brad.Sedore]

hey guys

i finally decided and i bought a 2X400 watt halide setup with 2 VHOs the fixture is about 40 inch long. how high should i mount or hang these things above my tank. i dont want to cook my fish but want max lighting for my tank

my tank is a 120 its 24 inchs high and 18 wide. 5 ft long

 

[melosu58]

Moved to General Hardware and equipment discussion.