whats up shovel??? 5000 kelvin is the color of the light wjite to blue for veg more red for flower here is a link to some good bulbs 85W 120V Spiral Medium Base i have 3 of these for veg 5000 kelvin and i have 3 of the 2700 kelvin 42 watt for bloom box!but i keep getting all males because i have the worst luck darn it ill keep an eye on this one bro keep us updated :thumbsup: