The lights are Catalina Aquarium. I got them off the big auction site. They are ok. They are 10k but I think they are really yellow. I may eventually switch to another brand. As far as the rocks, I just spent a lot of time stacking them. They would fall and it was actually a rather annoying process but I found a way to stack them that they are pretty strong and won't fall over. I didn't use any glue. Thanks for the compliments I as I am sure most of you do, I love the feedback...