OSRAM PLANTASTAR 600w

Description

OSRAM PLANTASTAR 600W is Osram’s horticultural-specification high-pressure sodium lamp, developed specifically for plant lighting with a spectral profile optimised for photosynthetically active radiation (PAR) rather than the lumen efficiency that standard SON-T lamps prioritise. We have been recommending Osram lamps to UK growers since 2017, and the Plantastar specification represents Osram’s most focused flowering and production lamp for serious horticulture applications.

Plantastar vs SON-T: The Horticultural Specification Difference

Standard HPS lamps including the SON-T are engineered to maximise lumens per watt — the measure of visible light to the human eye. The Plantastar shifts its output profile toward the wavelengths most effective for photosynthesis — specifically the orange-red range from 580–700nm that drives flowering, fruiting, and chlorophyll absorption at peak efficiency. While this adjustment can reduce the measured lumen output slightly compared to a standard SON-T of the same wattage, the photosynthetically active photon flux (PPFD) per watt is improved, meaning more of the lamp’s energy is doing productive photosynthetic work rather than generating light in wavelengths plants cannot use effectively. For serious production applications where canopy PPFD is the primary objective, the Plantastar specification offers a measurable advantage over the standard SON-T.

Compatibility and Replacement Schedule

The OSRAM Plantastar 600W operates in any standard 600W single-ended reflector and is compatible with both magnetic and digital 600W ballasts. Adjust-A-Wings, Lumii Black, and Lumatek reflectors are all suitable. Replace annually or at 10,000 hours — the Plantastar maintains better than 85% output at end of rated life, a performance level that cheaper generic lamps rarely approach by the same operating hours.

Pair the OSRAM Plantastar 600W with a Lumatek 600W digital ballast and an Adjust-A-Wings Avenger reflector for a complete, horticulturally optimised 600W HPS flowering system that maximises photosynthetically useful light delivery to your canopy.