... are available in 250,400, 430, 600, 750 and 1000 watt. Spectral Distribution for 600W Super High Pressure Sodium Lamp.ADVANTAGES ... and blue spectral ratios for good photosynthesis efficiencyGood lumen output for high PAR valuesRobust plants through high blue light ... average long life up to 32000 hours, high lumen output, lowenergy consumption)APPLICATIONS:Efficient growth lighting in green houseDay ...