OSRAM PLANTASTAR 250 W is a high‑pressure sodium horticulture lamp built for flowering and usable through vegetative growth thanks to an enhanced blue component. The lamp uses an E40 base with 230–240 V gear and outputs a warm 2000 K spectrum. Verified listings report a photosynthetic photon flux around 420 µmol/s with roughly 33,000–33,200 lumens and efficacy near 1.6 µmol/J. Typical coverage is a compact 60×60 up to 80×80 cm tent when paired with a suitable reflector and matching 250 W ballast. Reported service life reaches up to 32,000 hours (B50), with high output retention over time. This model suits small grow spaces where a single HPS can handle both stages while emphasizing strong bloom performance and acceptable vegetative response.
