Definity Digital MyNature Grow VGRO 38P WFL 120 For Improved Plant Growth, Bright White Excellent PAR output (22.40 mol / s) and photosynthetic efficiency Sp ectrum contains 23% Blue (400-500nm) to support strong stems and compact growth. Burns cool, reducing cooling and watering costs Rated Life L70 50,000 Hours @ 40C Warranty: 5 Year Limited