I am not a fan of puck reef light so my vote goes to sb reef. Puck style light will produce very intense light (densely packed in a small foot print) and better shimmer but not so good in coverage (due to cone shaped light output). On the other hand, grid/matrix type lighting offers the best coverage. If properly spaced (led bulbs) and equipped with diffuser lenses, it can penetrate deeper (good intensity) without disco effects. I built my own light based on grid/matrix design and I couldn't be happier.