Michelle The reason you use a warm white and a cool white in the same fixture is to give the light spectrum needed for growing plants. Only the Grow lights are full spectrum, Mixing a cool and a warm white gives that near full spectrum. The flourescent lights do not give off infrared. This can be suplimented with an incandest bulb. And please do not use Dr. Gareths intital light set up; distance from the plants; 2" (in) (inches) does not equal 2 m (meters) Heat mats, very definate plus for seed starting, 85F (30C) = ideal: A cheap mat is an adjustable heating pad; us a thermometer to adj and monitor the temperature, Place a plastic bag over it to keep the water out. Byron I hate OE 5.01