This is a brand new Philips Agro 930 bulb designed  This bulb was specifically designed for flowering plants, a full spectrum bulb with additional peaks in the red.  Although you can use this bulb all the way from clone through flower.   The bulb comes with a 1 year warranty from Philips directly.   This bulb puts off 1.5 par/W vrs 1 Par/W with the best HPS Double ended bulbs and only .66 Par/W with most LED's The Philips CMH 930 or 942(which I also sell) have the highest CRI of any bulb on the market thus they have a spectrum that is closest to natural sunlight. The bulb has a CRI (how closely the spectrum of the bulb matches the sun of 92 vrs a 22 with most HPS bulbs. The lamp should run for 20,000 hours, dont buy a new bulb for over 2 years The lamp is meant to run in an open fixture, do not put behind glass or air cool the bulb.  The protective outer layer of glass blocks the UV and the vast majority of the infrared heat (you can actually touch the bulb while it is running. You will save 33% on energy (1.5 Par/w CMH Light vrs 1Par/w HPS light means 2 315's or 630 total watts is the equivalent of 1000W of HPS light) You will save 25%+ on cooling (CMH bulbs reduce infrared heat we estimate 1500BTU of cooling for each bulb and ballast in your room.  With 2 lights (630W) that is 3000BTU of cooling required vrs 4000BTU with an 1000w HPS Savings can be close to 50% taking both of these into account.  Drastically increasing your net profit.   Under the right conditions, advanced growers are getting 0.8 g/w on low yeilding strains, 1-1.2g/w on medium yeilders and up to 1.5lbs/315W CMH with high yielding strains. I also sell complete light set ups for $400