Not a duel spec really but i use a gavita enhanced 240v for flowering have done for a good year now. It has the same lifespan as a 400v and very close par ratings to a 400v de. Thats if they are to be belived of course.
Its mainly red but kicks out a little blue. Overall a decent lamp.
I also use sunmaster or sol digital duel spec for veg. Depending if its 250w or 400w im after using.
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