I have access to about a dozen slightly used 70W metal halide ballasts. The hospital I work in id downgrading the entrance lighting to use CFL bulbs to be more energy efficient. They've only been used since Oct when they finished the facility. I can pick them up fairly cheap. Would these be worth using in a DIY light setup on a reef tank or are the too small? I haven't seen any posts on 70W metal halides anywhere else.
Here's a link to the ballast on 1000bulbs
http://www.1000bulbs.com/70-Watt-Pulse-Start-Ballast/957/
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Here's a link to the ballast on 1000bulbs
http://www.1000bulbs.com/70-Watt-Pulse-Start-Ballast/957/
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