1. 14" Depth
2. 150w HQI, 5" from water
3. Coralife clamp on, stock reflector
4. SPS and LPS
5. No media filter, or skimmer
My photo period is 10 hours a day, and I have some SPS frags about 3" from the water line that are colorful, growing, and encrusting. Pieces I have on the bottom are also doing well, along with Maxima clam that seems to constantly have new skeleton under its mantle
Though I find interest in this 6 hours per day theory, it makes sense with the muscle/workout analogy.