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#1
12-30-2008, 11:13 PM
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I was going to say the first thing would be to change the bulb, I run mh and hps fixtures in the parking lots of the buildings I take care of and 8-10 times its the bulb, however the humming sound from the ballast means that it's getting old and using more energy to fire the bulb keep your fingers crossed!!
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Always looking for the next best coral... 90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips 
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#2
12-30-2008, 11:52 PM
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Most of the humming is gone now that I changed the bulb. Its a dual ballast box and if I just leave the new bulb on and turn off the old one, the humming goes away almost completely. So...the ballast is obviously working very hard to keep the old bulb burning.
Thanks for the help guys!
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