OSRAM SON T PLUS 250w

Description

OSRAM SON-T PLUS 250W is the professional-grade high-pressure sodium lamp from Osram in the compact 250W power rating — the reliable, consistent light source for small grow tents, mother plant rooms, and secondary flowering spaces where the output of a 400W or 600W system would be excessive. We have been recommending OSRAM SON-T lamps to UK growers since 2017 because Osram’s manufacturing precision and batch-to-batch lumen output consistency represent a standard that cheaper alternatives consistently fall short of.

Why Lamp Quality Matters Even at 250W

It might seem that lamp brand matters less at lower wattages, but the opposite is true: at 250W, every percentage point of output matters more because the total photon budget is already limited. Osram’s SON-T Plus 250W produces approximately 33,000 initial lumens with better than 85% lumen maintenance at 5,000 hours — while generic 250W HPS lamps commonly deliver 15–25% less output from the same power draw and drop to 70% output by the same point in their service life. In a 60x80cm tent running a single 250W lamp, the difference between Osram quality and generic output can mean the difference between adequate and excellent canopy coverage for a full flowering cycle.

Setup and Operational Guidelines

The OSRAM SON-T Plus 250W operates in any standard single-ended 250W reflector and is compatible with both magnetic and digital 250W ballasts. Adjust-A-Wings Enforcer Mini, Lumii Mini Black, and similar compact 250W reflectors are all appropriate choices. Maintain at least 30–40cm lamp-to-canopy distance for heat management. Replace annually or at 10,000 hours — ageing HPS lamps continue to operate but deliver substantially reduced PAR output that translates directly to reduced yield without proportional reduction in electricity consumption. Always handle with clean cotton gloves to prevent skin oil contamination of the quartz outer envelope.

Pair the OSRAM SON-T Plus 250W with a quality 250W digital ballast and a compact reflector for a proven, reliable HPS lighting package for small growing spaces and dedicated propagation environments.

Browse the full range: Explore our complete New Products range at The Horticulture Company. Also in this range: IONIC CALMAG PRO, UGRO XL BASIC 70LITRE, EXHALE CO2 BAG, PLANT !T YOYO (PACK OF 8).