Quote:
Originally Posted by danny zubot
I suppose you need a specific HQI balast to run DE bulbs? In other words, can I use my existing magnetic balast for DE bulbs?
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Unfortunately, yes, unless you perhaps happen to have electronic ballasts because they usually can run both SE and DE. As for magnetic or traditional style ballasts though you need ANSI M80 and M81 ballasts for DE (M80=250, M81=150W).