Plants for my sandy, low-light 29g - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 12 Old 06-13-2008, 05:08 PM
Once again, misinformation is being spewed. WATTS HAVE NOTHING TO DO WITH THE AMOUNT OF LIGHT!!! Wattage tells you how much energy is consumed in producing the light.

Actinic lighting is not suitable for plants. The spectrum is wrong.

The things one needs to look at in selecting a bulb are Lumens and spectrum. That's it. Kelvins are a direct correlation of these two things. The majority of plants do best with a kelvin rating of 6700k to around 8200k. The wattage of the bulb is irrelevant. Some plants do like higher ratings, but their number is few when compared to most plants.
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post #12 of 12 Old 06-13-2008, 05:37 PM
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I'm very aware that the watts per gallon rule is outdated! He already said it was a t-8 6700k bulb, I just wanted to know how many watts it was so I could calculate the ACTUAL strength of the lighting.

Also, I was recommending that he buy a light fixture and when he wanted to switch over to saltwater, all he would have to do is change the bulb, not the entire fixture. So he'd have a 6700k-10,000k bulb for the freshwater tank, and he'd get the 50/50 when he went saltwater.
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