Sun System LEC 315 120v Light Emitting Ceramic Metal Halide Fixture w/ Free Ratchet Light Hangers REFLECTIVE FIXTURE: Fixture has 98% reflective German aluminum insert and 95% reflective textured corners for excellent output, uniformity and diffusion. FULL LIGHT SPECTRUM: Highly efficient agriculturally engineered CDM-T 315 Watt LEC brand lamp (lamp included). Greatly improved full color light spectrum out of next generation ceramic lamps. Higher amounts of beneficial UV and far red spectrums increase the lamp's growth power to the plants. 3100K TEMPERATURE COLOR: Very high 1.95 PPF (photosynthetic photon flux) per second light source. 3100 K color temperature, high 92 CRI, 33,000 initial lumens (105Lm/W). LONG LIFE: 20,000 hr lamp. High 90% lumen maintenance @ 8,000 hr. High 85% PPF maintenance @ 20,000 hr. HIGHLY EFFICIENT: 50/60 Hz low frequency, square wave, highly efficient Philips electronic ballast rated for 50,000 hr ballast life.