A grow light of 5500K will have more blue than a 2700K, thus better for vegging.

I have never seen a 5000k bulb though.
HARDDON Reviewed by HARDDON on . Lighting Does anyone know if a light being 5000K vs a light being 2700K (same watts) would be better or not? Im asking this because I found some CFL lights that can get to be about the equivalent of 400 watt bulbs that fit in normal sockets, use less energy, and NO HEAT. So I see this as being something better than HPS considering they can be REALLY close to the plants even though the HPS might have better quality light for the plants. Rating: 5