Philips (CMH) 315W 3100K
Philips Ceramic Metal Halide lamp features superior color quality and very crisp white light. Incredibly high 1.95 PPF (photosynthetic photon flux) per watt per second light source means no wasted energy producing light your plants can’t use. High 90% lumen maintenance at 8,000 hr, and still 85% maintenance at 20,000 hr. Delivers potency throughout its lifetime!