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The 1,000-watt OptiLUME™ HPS Double Ended Lamp delivers efficient, high-frequency lumen output with light concentrated in the red-orange spectrum for intense blooming and ripening power. Its double ended lamp technology promotes improved PAR maintenance over single ended lamps for a longer productive lamp life. With a 2,000-kelvin color temperature, 140,000 rated initial lumens and a 20,000-hour life rating, this lamp is compatible with electronic ballasts and double ended fixtures only. One-year warranty.