No, it can only cover a tank that is 6-7ft long and up to 3ft wide and 2ft deep though with any real impact. It is a fancy toy and not in the least bit critical to reef keeping, we did some research into the lunar phases and the relative intensity of the moon to the sun and then took that ratio to a 150w HQI lamp. It is reasonably accurate but by no means critical or perfect. I will say though that what almost everyone else calls a moonlight would be better called a night light.