I can definitely say the light grow's Macro's, however now that I have cranked it up in terms of intensity I am getting better growth from my greens, reds tend to be able to adjust to a greater range of light. Its funny but that tends to apply to FW plants as well, the brighter green the plant the more intense the light needs to be. Its crazy how well my shaving brush plants are doing, I just found one growing out of LR! not sure if it wormed its way up through the LR from the sand underneath or what.