These ultra high performance LED bars are full spectrum and include two peak color temperatures; one at 3500K and one at 5000K. The design of the circuitry and reflector maximizes the amount of light energy put down to the plants. If desired, we can customize the bars to split the 3500K and 5000K channels such that they are independently controllable. Each bar includes an appropriate power supply and in-line dimmer. For custom split LED bars, a Y-adapter and two in-line dimmers are included. Each dimmer has six steps of dimming.