Planted Tank VIP
Join Date: Jul 2002
Location: Winston-Salem, NC
Generally speaking, "Warm" is usually 3700K, "Cool" is 4100K, "Daylight" is >5000K.
Anything less than 5000K is pretty unsuitable for aquarium use and will grow algae better than anything else. But as you have seen, manufacturers can say pretty much anything they want. The color temperature is a somewhat antiquated measure, dating from incandescent bulb days. (It's actually the temperature that the tungsten filament in an incandescent bulb achieves. Each temperature corresponded to a particular "color" up to a point. Past 6000 degrees Kelvin, it does not correlate well.)
- Sam P -
plantedtanker in limbo - all tanks currently in storage