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Old 04-03-2005, 10:52 PM   #1
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How long do PC's last?

(I apologize if this has been answered before, but I did search the forum posts and couldn't find anyhting)

What is the expected useful life of a Power Compact Flourescent bulb? I have 4 96w in my Coralife hood, they are about 7 months old.

What are the signs that they need replacing?
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Old 04-03-2005, 11:36 PM   #2
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I replace mine after 9 months. 12 months is the suggested life by many manufactuers but I have found the color and intensity really drops off around 9 months.
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Old 04-04-2005, 12:46 PM   #3
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Especially the actinic's...those will really fade out over time. Defintely replace annually.
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Old 04-04-2005, 12:55 PM   #4
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I did mine after a year and WOW what a diff it made...
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Old 04-04-2005, 05:28 PM   #5
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mine are only about 6 months old and I can stare Into the bulb while it's lit and it doesn't even hurt........ I have to change them when I get home.
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Old 04-04-2005, 05:52 PM   #6
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When you replace them, would you replace all at once or half at a time? One at a time?
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Old 04-04-2005, 09:42 PM   #7
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PC's half at a time. Half now, the other half in 2 weeks.
MH one at a time!
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Old 04-04-2005, 11:56 PM   #8
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Look at the ends of the bulbs, if it looks liek you held a lighter up to the glass , then it is close to changing time. I dont know if it is true or not, but I have been told that it is a sign of the gases getting old, and they start overheating until the bulb blows out.
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