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#1
12-28-2007, 05:50 PM
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i used to run 3X 250 watt 10k xms in a similar configuration on ice cap ballasts and noticed the exact same thing. I thought I was going crazy! good to hear someone else noticed the same thing. I switched out every ballast and every bulb and continued to notice the same thing - the order that the ballasts were plugged into the power bar definitely changed the perceived color of the bulbs. strange phenomenon and I thought it was just my setup...
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#2
12-28-2007, 06:13 PM
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I did wire the reflectors myself. Still crazy that that the light was the same across all 3 bulbs before I started to change things.
It is definitely different light output. I am able to swing the lights out from above the tank and used a light meter on all three bulbs using a grey card. The difference is significant J
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#3
12-28-2007, 06:38 PM
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Maybe the fact that the bulb got shook up, moved around a little when taking it out and back, somehow affected the arc tube? Maybe we need to make it a point of routine to shake our lamps a little every couple of months?
 Wait, is it better now that it's different, or worse?Or ... hmmm, wait, yeah you said you're using electronic ballasts. I wonder if a lamp just gets "used" to a particular ballast, and after switching them, they have to sort of re-burn in? Maybe it's just enough of a difference that even switching back to the original ballast is still different enough now that it still needs to go through the re-burn-in phase? (Just grasping at straws here really ... it's rather quite a bizarre observation!)
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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