The MASTER GreenPower Xtra 5X6CT is a six-lamp case of 600W high-pressure sodium (HPS) grow lights made for the flowering phase. Designed for serious cannabis growers who want to keep energy costs low without sacrificing performance during flower, they deliver the same intense 2100K red-rich spectrum as standard 600W bulbs — but are 7% more energy efficient, making them a great option for keeping operation costs low in high-intensity flowering rooms. With 90,000 lumens and rated for 30,000 hours of consistent, these lamps promote deep canopy penetration and dense, resin-rich buds. Compatible with any fixture using a standard E40 base, they deliver the best spread when paired with high-quality ballasts and reflectors. For exceptional full-spectrum performance ideal for transitioning from veg to flower, check out the GreenPower Plus 600W UNP. For smaller setups or lower-wattage needs, the MASTER SON-T PIA Plus 400W E40 delivers dependable power during flower.
