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View Full Version : Longevity of a 250W DE W/HQI ballast?

johnnstacy
08/12/2006, 06:07 PM
Optimally, when should I think about replacing my 250W DE bulbs with new ones? They are on PFO HQI ballasts.
johnnstacy
08/16/2006, 09:26 AM
bump
johnnstacy
08/16/2006, 04:59 PM
Does anyone use DE bulbs?
reefah
08/16/2006, 05:04 PM
once a year
CCG
08/16/2006, 05:45 PM
I change mine once a year

Colin