High pressure sodium grow light bulbs, perfect for professional hydroponic plant cultivation. Features: E39 base 600W HPS bulb, compatible with electronic and magnetic ballasts. High pressure sodium grow light spectrum can stimulate flower growth and enhance fruiting. 2000K red-orange spectrum, perfect for professional hydroponic plant cultivation. 30000 hours long life-span time, 87000 lumens. Photometric andamp Radiometric Parameters: Flux=92185 lm Eff. : 148.95 lm or W Fe=223.80 W Flux of emitted photons(umol or s): 1105.3 Fluo. and blue light ratio: 20.88 Fluorescent eff.: 315.7 Photosynthetic: PPF: 1046.9umol or s PAR WATT: 2.1375eand005mW(400-700nm) Specifications: Material: Glass and Metal Power: 600W Working Voltage: 120Vandplusmn 10 Color Temperature: 2000K Base: E39 Efficiency: 140 Lumens: 87000LM Color Rendering Index(CRI): andgt 20Ra Life Time: 30000 hours Item Size: 4.6 x 28.5cm or 1.8 x 11.2in (D x H) Item Weight: 172g or 6.1oz Package Size: 29 x 5 x 5cm or 11.4 x 2 x 2in Package Weight: 217g or 7.7oz Package List: 1 x HPS Light Bulb