Lighting to grow macro algae?

I need lighting to grow macro algae...

would 1 watt LED lighting be enough to run a 14gallon tank of macro algae?

or should I look for higher Kelvin?
 
I bet those Current Power Brites would be enough - in fact, I think I know of someone who uses them. I don't know that they come in 6700k form. But I'm quite certain the 10k would grow cheato just fine.
 
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