High pressure sodium grow light bulbs, perfect for professional hydroponic plant cultivation.<br> Features:<br> E39 base 600W HPS bulb, compatible with electronic and magnetic ballasts.<br> High pressure sodium grow light spectrum can stimulate flower growth and enhance fruiting.<br> 2000K red-orange spectrum, perfect for professional hydroponic plant cultivation.<br> 30000 hours long life-span time, 87000 lumens.<br> Photometric & Radiometric Parameters:<br> Flux=92185 lm Eff. : 148.95 lm/W Fe=223.80 W<br> Flux of emitted photons(umol/s): 1105.3 Fluo. and blue light ratio: 20.88 Fluorescent eff.: 315.7<br> Photosynthetic: PPF: 1046.9umol/s PAR WATT: 2.1375e+005mW(400-700nm)<br> Specifications:<br> Material: Glass + Metal<br> Power: 600W<br> Working Voltage: 120V±10<br> Color Temperature: 2000K<br> Base: E39<br> Efficiency: 140<br> Lumens: 87000LM<br> Color Rendering Index(CRI): >20Ra<br> Life Time: 30000 hours<br> Item Size: 4.6 * 28.5cm / 1.8 * 11.2in (D * H)<br> Item Weight: 172g / 6.1oz<br> Package Size: 29 * 5 * 5cm / 11.4 * 2 * 2in<br> Package Weight: 217g / 7.7oz<br> Package List:<br> 1 * HPS Light Bulb