- Joined
- Feb 3, 2012
- Messages
- 197
- Reaction score
- 217
- Location
- Chandler, AZ
- What state or country do you live in
- Arizona
I ended up lowering the light rack a few inches, they were at 11in and now they sit at 9 inches off the water. I did remove the top screen so I could get the apogee biotek 3000 par meter down into the tank.I'm pretty surprised at the low numbers coming out of those 26s, especially considering there should be overlap between them too. How high are they off the water? Was the test done with the covers on the tank? I assume this is at 100%, but not with all channels on max?
I built my own LEDs, but raising them just an inch made a pretty big difference in PAR (-100), so lowering them might be another thing to try?
I was surprised as well at the par readings, to the point that I reloaded the default configuration for the par meter and then recalibrated only to get the same results.

