[lewisxlove]

I was told that a mercury vapor ballast/ light could be used for a reef tank? Is this true? :confused:

[jvharding]

Lighting is rated on the kelvin scale. 6500K is normal day light 10000K and higher recomended for most hard corals and clams.

[Catzklawz]

Some mercury vapor ballasts will also fire MH bulbs and vice versa, my magnetek MH ballasts say right on them h-37 merc. also m-58 mh. merc vapor lamps are no good for a tank as you can get them in the propor wave lengths but if you do the research you may find Mercury ballasts that will work for MH bulbs just add a couple Mogul fixture Viola MH lighting on the cheap...