http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=spectrum-of-light#1 What spectrum of light is required for a freshwater aquarium? THANKS! Daniel original post: March 8, 2007, 6:47 am anonymous 2008-05-02 http://forum.aqua-fish.net/?topic=spectrum-of-light#2 Hello Daniel, It is necessary to have the right bulb for your aquarium, and freshwater aquariums should have daylight bulbs with the Kelvin temperature of 4500°K-5000°K. jan 2008-05-02 http://forum.aqua-fish.net/?topic=spectrum-of-light#3 If you have a fish only freshwater aquarium, then you should use a normal aquarium bulb that produces a mild red, warm color. Matt anonymous 2008-05-02