Sun System LEC 315 Commercial utilizes cutting edge Light Emitting Ceramic technology. State-of-the-art 95% reflective German aluminum interior offers unparalleled output,reflectivity and diffusion. Includes Philips highly efficient agriculturally engineered CDM 315/U/O lamp. This lamp creates amazing 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. Very high 1.95 PPF per second light source (3100 K lamp). 3100 K or 4200 K color temperature, high 92 CRI, 33,000 initial lumens (105Lm/W). Long life 20,000 hour lamp. High 90% lumen maintenance @ 8000 hr. High 85% PPF maintenance @ 20,000 hr. Unique open rated lamp construction reduces radiant heat from the arc tube and is suitable for open fixture use. The LEC 315 Commercial has a Philips 50/60 Hz low frequency, square wave, highly efficient electronic ballast rated for 50,000 hour ballast life. The compact commercial design to minimize greenhouse sunlight blockage. Power cord/plug configuration varies by fixture voltage. Detachable unistrut mounting hangers or traditional V-hangers.