Use these 54 Watt T5 6500 Kelvin high output fluorescent bulbs for your Tek-Light, Sun Blaze, Inner Sun, Spectra Max & New Wave grow light fixtures. These 6500K (Day Light Spectrum) high output lamps offer 2000 lumens per lamp. These fluorescent bulbs have a very low heat factor which allows the fixture to be hung very close the plant canopy, raising light levels.