Does “deepwater” live rock require less light than other types of live rock?
Yes. Although, for instance, Vava’u live rock from Tonga deep waters can be trained to handle more light and become adapted to more light by slowly increasing the light levels (photoperiod). “Deepwater” live rock comes from deep water where it’s not accustomed to super bright light, though will adapt. It is great for non-halide lit tanks.