OSRAM PLANTASTAR 400w

Description

The Osram Plantastar 400W is the mid-range member of the Osram Plantastar HPS lamp family — the trusted choice for growers running 1.0m x 1.0m to 1.0m x 1.2m tent setups, or those who want quality Plantastar HPS performance in a wattage that generates less heat than the 600W option without sacrificing spectral quality. The 400W output suits compact growing environments and is particularly popular for high-quality single or two-plant grows where intensity per square metre can be high on a smaller footprint.

Plantastar’s formulated phosphor chemistry delivers a red-orange dominant spectrum specifically optimised for photosynthetic efficiency during the flowering phase. The lamp achieves notably higher PAR output per watt than unbranded or generic HPS alternatives, a difference that translates directly into greater canopy light exposure and, across a full grow cycle, measurably better flower development and yield per watt invested in electricity. Using a quality lamp like Plantastar rather than a budget replacement is one of the simplest and most cost-effective performance improvements available to growers already running HPS systems.

The 400W Plantastar is compatible with all quality 400W HPS magnetic ballasts and most digital ballast systems that support 400W HPS mode. It fits the E40 mogul base standard used by all professional reflectors and lamp holders. Lamp output begins to decline after 12-18 months of use — budget for annual lamp replacement to maintain consistent yield quality. Available at The Horticulture Company alongside Plantastar 600W, SON-T options, and quality 400W digital and magnetic ballasts.

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).