Diamond LEC Ceramic Metal Halide Fixture ballast bulb 240V 277V w 4200K bulb (All Purpose) bulbs Key Features Non toxic and non nutritive Balanced elemental bioavailability is 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 NEMA Plug Configuration High 90% lumen maintenance @ 8 Chinese Patent: ZL201430011816