Thank you very much for your advise, however I don't think we are talking about the same model ? Mine has 150 led's not 144, I think I know the one you are talking about but it is a different ball game altogether. I understand where you are coming from though regarding the inverse square law of light and it also depends on how much light you can squeeze into a given angle, remember ,
we are talking about lenses here not reflectors. I will try to find the link for a Cree paper regarding reflectors and will post it on here IF I can find it
so were talking about the lens angle that is on the chip or are you adding additional reflectors like the x-lens ...? Both, you will still have to be careful the penetration power of both the whites and blues. Sure would help if you gave some more information on the look / style and model etc of the led you are getting manufactured. Can you get any pictures?
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" In addition I think most growers agree that LED's are great for veg but all the HPS enthusiasts say the LED's are rubbish for flowering ?"
not all HPS users think they are rubbish for flower, but most on rollitup do(lol) . I have converted many myself. And with the right LEDs and training techniques I believe led is superior in quality and yield. HID is old history in the twentieth century