That is very true what Millertm is saying, it is the reason why I changed my setup in the beginning turning all the bulbs to their sides from this:
To this way:
At least I won't have this problem with the LED
I think the reflectors made a huge difference. I would take my lux meter and adjust them all so the lighting was even all over. Now with the led on this grow it is extremely easy to keep it at 40000+ lux