Thanks soooo much for that chart. I and several others owe you one, or two. I think I want to play with it in photoshop to find the exact numbers of the peaks like I did with the other charts I posted. If I do, I'll post it in the other thread (physicsnole's).

I think I like the sepia better than B&W, but I don't know if I like it better than actual color. I think I'm leaning toward color. I think the best would be if you could wait until just after the lights go out, or just before they come on to take the pictures. It will not affect the plants, if you are worried about that. The plants aren't going to know if they got 12 hr. of light or 12 hr. and 2 seconds.