I currently use a 6500K 95 watt bulb over my refugium and it is useless for growing macro algae. Almost as if something is missing in the spectrum. If the bulb is available locally I will give it a try
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Originally Posted by Beverly
Bryan,
I read the text that went along with the package of the bulb. It's rated at 5100K. Personally, I wouldn't use anything under 5500K, with 6500K being considered very close to daylight. But it looks cheap enough to give it a try. Let us know how it works out if you find it and use it.
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