Quote:
Originally Posted by undertai
Dose not apply to leds. They are more of a focus light. Putting say like 10 3watt less over a 20 gallon tank. Is like putting a 250w mh light over your tank with a lot less heat.
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Thats funny. Depends on what type of lighting and look do you want? How tall is your tank? If you want a bunch of UV LEDS or if you want to compete with the colors of MH and T5 you will need to add much more. If you just want the 450 blue and 8000K look then less.