Sylvania’s GroXpress SHP‑T 600W E40 is a high‑pressure sodium horticultural lamp designed for flowering and supplemental lighting. It uses an E40 base and operates with external control gear, delivering a GroLux spectrum at around 2050 K with strong red output for plant development. The lamp is rated at 600 W with an average service life of 24,000 hours and is dimmable when used with appropriate gear. Official materials position it for small to medium greenhouses and indoor gardens. Retail specifications list a photon output up to approximately 950 µmol/s and typical coverage around 1.2 m², depending on reflector and mounting height.
