You think there pricy check out these badboys....http://www.budmaster.co.uk/budmaster-ii-1200-god-led-grow-light.html using some high end chips though which is nice to see.
Phew, very pricey and I'll agree they are high end chips but I'd love to see where they get their claim of 200-300% more par than traditional leds!
Osram InGaAlP thin film is brilliant and has been around for a long time but I've yet to see anything from Osram themselves claiming anything more than a 20% improvement in efficiency. Any idea which Osram chip range they use in the budmasters?