Hey, John, are you able to capture the green hue of the GSP under the full MH photo period?
My tank's GSP's green flourescent is very obvious with our eyes, but are often difficult to capture with Digital camera. Turning the lights off with only the actinic on is easy, but then it doesn't show other colors.
I'm running VHO (2x full spec, 1x 50/50, 1x actinic), so I can usually get pretty accurate color representation. These GSPs are actually pretty bland, as far as green goes. I like the white centers in them though, so I'm keeping them around .
I usually tighten the levels a bit, increase saturation a bit, and increase green and red a bit in Photoshop to bring out the color a bit more and make it more accurate to real-life.