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Originally Posted by jppurchase
I prefer to use full spectrum tubes, meaning that all the colors of the rainbow are present in the light, and with a color temperature of 5,000 K - 6,700 K. The 5,000 K bulbs are a soft, warm white while the 6,700 K bulbs are a crisp white light, tendiing to blue.
James Purchase
Toronto
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IME any light, as long as there is enough of it, will grow plants.They may or may not grow differently under different lights but they will grow. As I mentioned I like to mix a few bulbs of different ratings. When its time to sit down and enjoy the tank I leave only the 9325 on because I like how the tank looks under this light. The tank uses 6700k 10,000k and 9325k. Plants like it, I like it! I think in a situation where one is limited to only use one bulb then 5000k-7600k are probably the best bet for an all around choice.