SunBlaster LED lights are designed to maximize overall performance, economy and extend longevity, while providing the best possible lighting for all indoor horticultural applications without fail or compromise. These fixtures incorporate 6400ø K LED lights rated at 50,000 hrs. Self-Cooling Technology (SCT) allowed SunBlaster to push the lighting output to the desired levels without creating unwanted heat. The 18 inch fixture has 1,950 lumens, 2 ft has 2,550 lumens, 3 ft has 3,900 lumens and the 4 ft has 5,150 lumens. Included with each fixture is 6 ft power cord with on/off rocker switch, 2 flush mounts, 2 hanging clips and link cord.