LEC 315 Watt 240V Ceramic Metal Halide w 4200K Philips Bulb for Vegetative Stage bulbs Key Features Non toxic and non nutritive Auto dim at Set Key Features Non toxic and non nutritive Safe to use on plants in and stage of growth Works to descale irrigation systems and decompose residual organic matter Effective as a final flush to remove mineral buildup (scale) in growing media and irrigation lines Very low TDS Doesn't throw off mineral balance Keeps irrigation system cleaner and running efficiently longer How To Use System Maintenance: Irrigation systems that are regularly maintained with Athena Cleanse treatment will last longer and run more optimally throughout Mineral buildup and lockout is a major cause of deficiencies and plant health problems solve these issues with Athena Cleanse but you can still get a great fixture at a great price All sales final