QUOTE (Urchinhead @ Mar 15 2010, 03:09 PM)

The answer is going to be... It depends...
Do you want consistent PAR across the whole tank and an even light distribution or a setup where PAR will be very intense then drop off the further you get from center point on the light?
Do you want shimmer?
How much spectrum diversity do you want?
What are your thoughts on power consumption, bulb life, etc?
Etc.
If you want constant PAR and allot of spectrum diversity then its the ATI. If you want shimmer and don't care about the other two as much then LED same with power consumption and bulb life except in reverse. In that if both matter to you then you want LED.
yes even par no drop off
no shimmer
indifferent about spectrum
would be a plus to not use so much power and have long bulb life of course