InterLux EXTREME HPS bulbs have a light spectrum shifted towards the red, ideally suited for the flowering stages of growth. Designed specifically for indoor growing, they have been tested and developed.InterLux EXTREME HPS bulbs have a light spectrum shifted towards the red, ideally suited for the flowering stages of growth. Designed specifically for indoor growing, they have been tested and developed to work perfectly with electronic ballasts, and have an extremely high lumen output with a wide color spectrum for maximum yield. Standard E39 Base. 1 year warranty against original manufacturer defects. Works with electronic ballasts only. 215,000 LUMENS
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