To shed some light on the subject of daylight illumination, aquarium stores sell fluorescent lights that have the same properties of sunlight. These lighting systems require a ballast for converting power and the bulbs themselves. there is a wide range of bulbs from a marine cool blue to plain white. The type you would need is a sunlight bulb ay around 40 watts each. Try to get a ballast for two or three bulbs, the amount of power these bulbs is minimal and will benefit the fuzzies. I have these same bulbs on my 40 gallon tank and my plants don't complain , they grow very well . Another benefit of these lighting systems is that they don't usually get as hot as a regular incandescent light and have tight fitting rubber caps to sell out moisture, this will keep the fuzzies from getting shocked . If you need any other information on these bulbs contact me privately. ferreter (mark) [Posted in FML issue 3973]