Growers Choice 315 Watt CMH Bulb, 10,000KThe addition of 10K UV light towards the end of the bloom cycle increases resin production in flowering plants as a defense mechanism in response to the ultraviolet light. Now, growers using CMH LEC fixtures can get these benefits too with the industrys first and only 315w 10K MH Finishing Lamp. Features: For use in 315w CMH LEC fixtures Strong UV peaks for increased resin production Can be used for 25+ flower cycles before replacement Use only in the