So everyone know I changed mine pretty dramatically yesterday. I now have:
The 4 in the center are overdriven with an Icecap 660
Front:
Sfiligoi - Super Actinic
ATI: Blue Plus
ATI: Pro Color
ATI: Blue Plus
ATI: Blue Plus
ATI: Blue Plus
Here are the measurements on my 75 gallon
20" water depth
5" from water to bulbs
6 54watt T5 bulbs, the 4 in the center overdriven by an Icecap660. All 6 bulbs have TEK reflectors. From Front to back ATI True Actinic, Blue+, Pro Color, Blue+, Blue+, Blue+
Various ages of bulbs.
2 inches below bulbs par-1010
1 inch below water line par-690
In the sand when the par = 250 with all 6 bulbs, the par = 190 with only the 4 center bulbs lit.
The readings differ at the same level due to which bulb the par meter is under and/or the center brace.