A SUNMASTER Neutral Deluxe Day Conversion bulb to put into your HPS system and change it to a Metal Halide. The Neutral Deluxe Day version emits balanced light similar to the natural look of daylight, which is around 5000 - 6500 Kelvin. Very good for promoting vegetative growth. These lamps have a high PAR watt rating - the most objective measurement of total light energy available for photosynthesis. Also, Universal bulbs will lose 15% of the light if burned in the horizontal position. Produces 92,000 Lumens and 320 PAR watts.<