Sun System? LEC? Brand 630 Watt 8 in Air-Cooled Fixture utilizes cutting edge Light Emitting Ceramic? brand technology. The patented sealed optic technology allows removal of heat generated by the lamp without cooling the lamp. Includes 8 in low profile air-cooled fittings. Accommodates standard 8 in flexible ducting. This fixture has a dual lamp configuration offering increased wattage in a single fixture design. Fixture has 98% reflective German aluminum insert and 95% reflective textured corners for excellent output, uniformity and diffusion. Highly efficient agriculturally engineered CDM-T Agro 315 Watt lamps (included) for LEC? brand fixtures. Greatly improved full color light spectrum out of next generation ceramic lamps. Higher amounts of beneficial UV and far red spectrums increase the lamps growth power to the plants. Very high 1.95 PPF per second light source. 3100?K or 4200?K color temperature, high 92 CRI, 33,000 initial lumens (105Lm/W). Long life 20,000 hour lamp. 50/60 Hz low frequency, square wave, highly efficient electronic ballast rated for 50,000 hour ballast life. LEC? brand 630 watt ballast incorporates built in thermal protection. Galvanized steel housing with durable powder coated finish. Manufactured with exacting standards and double neoprene gaskets for an air tight seal. Hinged glass makes changing lamps and cleaning glass easy. Comes with built in level for easy, consistent, level hanging. US Patents: D732,236, D756,026. US Patents Pending: 14/701,134, 14/662,706, 29/516,347, 29/550,803. Chinese Patents: ZL201430548157.9, ZL201630169627X. One year warranty on lamps.