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Sunmaster 600 watt HPS MH Conversion Bulb Metal Halide $84.95 Sunmaster 400 watt HPS MH Conversion Bulb Metal Halide $49.95 1000w Conversion MH Bulb Runs On HPS Ballast Grow Light $49.9 400w Conversion MH Bulb Runs On HPS Ballast Grow Light $29.9 Grow Light 400w metal halide with HPS conversion bulb $100.0 Sunmaster 1000 watt MH HPS Conversion Bulb Metal Halide $99.95 Sunmaster 1000 watt HPS MH Conversion Bulb Metal Halide $99.95 Sunmaster 400 watt HPS MH Conversion Bulb Metal Halide $59.95 Sunmaster 600 watt HPS MH Conversion Bulb Metal Halide $89.95 250 watt w HPS to MH CONVERSION BULB GROW LIGHT (BLUE) $32.89 250 watt w HPS to MH CONVERSION BULB GROW LIGHT (BLUE) $32.89 BLUE GROW LIGHT mix w/ HPS repl 400 MH conversion bulb $96.89 BLUE GROW LIGHT mix w/ HPS repl 400 MH conversion bulb $96.89 1000 w watt white grow light conversion bulb HPS to MH $39.89