SunMaster Warm Deluxe lamps surpass all other HID sources in PAR Watts - the most objective measurement of total light energy available for photosynthesis. Available in 400 and 1000 Watt horizontal and 1100 Watt universal burning versions, these bulbs are for use in equivalent Wattage metal halide fixtures equipped with a mogul socket with positioning slot.
SunMaster measures artificial horticultural light in Photosynthetically Active Radiation (PAR) Watts. While lumens are based on the eye sensitivity curve of human beings, PAR Watts objectively measure the total Watts of light emitted by a lamp in the spectral region that plants respond to. They account for the nutritional value of light and are a direct measure of the light energy available for photosynthesis. 105,000 lumens.