The Vivosun 1000W HPS Grow Bulb is a single‑ended high‑pressure sodium lamp for flowering spaces that use compatible magnetic or digital ballasts. It features a standard E39 mogul base and a warm 2100K output concentrated in the red/orange portion of the spectrum for bloom. Packaged specs indicate approximately 140,000 initial lumens with an ET25 envelope and an overall size of about 15 inches long by 3 inches diameter. In an appropriate reflector or hood, 1000W HPS is typically applied to roughly a 5x5 ft flowering footprint; actual results depend on reflector design, hanging height, and environmental control. This listing is for the bulb only (no ballast or reflector). Allow proper warm‑up and cool‑down before restriking to preserve performance and service life.
