Adam the question is do you have any large colonies under leds?. Like I said the shadowing/self shading for me is the bad part, they are fine on my frag tanks but on my full colonies I need allot more Fixtures than recommended. Lps do frigged great under them.
I am supposed to be betta testing a new led fixture coming up on my frag tanks. It will be going up against t-5 and a halide fixture. I have not heard much so maybe it fell through.
I think with sps UV used to be a big issue but now allot of fixtures are getting around the 400 nm range and the Kessils are even lower so this is becoming less and less a problem.
Hey Dave!
Unfortunately I don't have any large sprawling colonies under LEDs but I've got stuff that's over 4 years old now, grown entirely with Led. My largest is a yellow tort about 5" and a shades of fall about that size as well. But they all get fragged a lot so its kind of different in that regard, compared to a colony left alone to grow. I mean they are moved around and handled and clipped pretty often. I'm running reef breeders fixtures and i think the board layout eases shading issues a bit more than "puck" type leds for sure. For what its worth.
A lot of people much smarter than me have said over years that the warm/neutral whites are the key. And from what I had experienced myself I can agree that I've have the best results running fixtures with neutrals over cools.