1000w double ended ( DE ) high pressure sodium ( HPS) lamp by SolisTek. 

The SolisTek 1000W DE HPS (2,100+ µmol), one of the highest output double ended lamps on the market & has an incredible depreciation rate of 5% @ 10,000 hours.  Optimal for all stages of growth.

SolisTek double ended lamps feature premium quartz glass for enhanced spectrum and penetration to your plants which results with higher quality and yield.