How many watts per LED bulb is needed to grow SPS coral? Our benchmark for MH or T5 was wattage, how does this compare to LED? Is PAR the only reference available? If someone said they were runnung a 400W 14K MH bulb, you would know it would be awesome for SPS, this doesn't seem to exist in LED. All I hear is brand (mostly Cree) number of bulbs, and number of watts per bulb.
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