Sylvania’s Gro-Lux SHP-TS 400W E40 SLV is a high-pressure sodium horticulture lamp for greenhouses and indoor gardens. It uses an E40 base and is designed for open fixtures. The Gro-Lux spectrum supports full-cycle growing with a warm overall colour temperature of 2050 K. On Sylvania’s current spec page, the lamp’s actual power consumption is listed at 425 W and the average life at 26,000 hours, with a maximum bulb diameter of 48 mm and length about 292 mm. Weight is about 0.152 kg. Retail grow‑shop guidance places its effective coverage around 1 m² (roughly a 100 × 100 cm area), with some shops advising 80 × 80 to 100 × 100 cm depending on crop and reflector.
