The MASTER SON-T PIA Plus 400W E40 is a high-pressure sodium (HPS) grow lamp designed for exceptional production during flower. With a 2000K spectrum and output of up to 56,500 lumens, it promotes dense, resin-rich buds, delivering efficient light absorption deep into the canopy. Equipped with the patented PIA (Philips Integrated Antenna) technology, it ensures reliable ignition and long-term stable light performance. Boasting a 28,500-hour lifespan, it fits standard E40 sockets — making it a solid option for growers running small flower rooms, split veg and flower spaces, or incorporating into supplemental lighting setups for increased efficiency and spectrum quality. If you’re looking for another option with the same wattage class, check out the MASTER GreenPower CG T 400W — offering upgraded output and deeper canopy penetration. For veg, consider the MASTER HPI-T Plus 400W/643 E39 1SL.
