Indoor Sun 1000W / 400V Pro HPS DE Lamp HV The HPS DE PRO HV series is engineered for professional growers, it delivers superior flowering grow light with electronic HV arc tube inside of high tempered double ended glass. HV SERIES are lamps which have a voltage as high as 265V, however are known and marketed as 400V. All the Double Ended lamps are HIGH VOLTAGE. They work with lower current (amps) which causes less power loss and lower temperature, resulting in a higher lifespan of the ballast. They provide higher values of PPF & PPF/W than low voltage standard lamps. POWER 600W 800W 1000W PRODUCT CODE M2350 M2355 M2360 COLOUR TEMP. (?K) 2000 2000 2000 MAX. PPF (µmol/s) 1200 1620 2220 MAX. PPF EFF (µmol/s/w) 1.79 1.84 1.92 LIFESPAN HOURS 10,000 10,000 10,000 CRI % 28 35 35 LUMENS 95000 125000 160000