Lighting

[danj]

I have just purchased a 542 watt halide light sys. I would like to know how far from the water surface i should have the light?? I have a 55g tank live rock,4 small fish, feather dusters, small polyp and anemones.
TIA

[Biggen]

You basically want to make sure that no water splashes on the bulbs. My light canopy is mounted 10 inches above my waters surface. This ensures that nothing gets wet.