Philips 901574 860W CDM All Start Growing Lamp This Philips lamp features superior color quality and very crisp White light Philips energy advantage cdm lamp with all start technology is a high-efficiency protected, open fixture rated cdm lighting solution that provides energy savings without compromising light quality It will operate on any MH, HPS or pulse start 1000 watt Magnetic ballast. Not approved to operate on electronic ballasts The cdm 860 is vertical burning open fixture rated lamp available in 4100 Degree K color, high 92 cri and 82,000 initial Lumens This lamp is ideal for use in the sun system lumenmax vertical (base up) Remote reflector