Fluorescent lamps are designed for all plant growth stages. T8 and T5 fluorescent lamps are available in 3000° Kelvin for flowering and fruiting stages, 5000° Kelvin for vegetative growth, and 6000° Kelvin for full spectrum growth. 4 foot T10 5000K fluorescent lamps replace standard T12 lamps, and T12 fluorescent lamps are availabe in 2ft, 3ft, and 4ft lengths. Fluorescent lamps produce very little heat and may be operated within 4 inches above the plant canopy.