I have a BTA with PC lighting 384W in a 125G, but have the LR within 8" of the lights. When I first put him in about 2 months ago, I put him at the top where I thought would be the optimal location. However, he moved around for a couple of days, and ended up lower in the rock structure and orients himself to the light. He seems to be doing fine, but I guess time will tell. I figure if he wants more light, he has the option to go higher. I just added a LTA with purple tentacles that has also located himself in such a manner, but have only had for a week so too soon to tell with him also. If you'd like I can keep you posted on their progress or lack thereof:joy: