I've used them for annuals and tomatoes last spring and they worked like a charm - compact and strong plants, completely different than previous years with natural light at a west-sided window. I've never had any of the "classical" growing lights, so I can't compare to those. No Idea if they work with grown up plants, but i wouldn't see why not. They do look funny though - everything's bright pink...you should switch to full spectral if you want to enjoy your flowers,,, Am 05.11.2015 um 22:50 schrieb David Pilling: > Hi, > > The latest idea for growing plants under lights is to use red and blue > LEDs - plants reflect all the green light. Speculation is that this > technique will make growing many crops in England in Winter viable. > > LEDs are more efficient than older light sources. > > ebay.com (home of cheap and cheerful LEDs from China) knows all about: > > LED grow light > > I wonder if anyone has tried these? > > > -- Martin ---------------------------------------------- Southern Germany Likely zone 7a