I spoke to philips they make to best horticultural lights in the world they said not to even bother with l.e.d for flowering I know this post is gonna spark a reaction with people who use them and get results but really how can we argue if philips had a l.e.d that worked for flowering why would they not bring it to market they have a great l.e.d strip light for propagation I have 4 of them other wise its gotta be d papillons and gavitas for flowering