HORTILUX BLUE Metal Halide grow lamps provide world class spectrum that is unmatched in the lighting industry. HORTILUX BLUE is the closest match to natural sunlight of any light source available today. Hortilux Blue Daylight Metal Halide lamp is for experienced growers who demand the highest quality plant production. Hortilux Blue Daylight Metal Halide bulbs are designed to provide a fully balanced light spectrum that replicates natural sunlight. The exclusive Iwasaki/EYE Hortilux chemistry provides levels of Red, Blue and Green spectral energy optimizing plant growth and yield. Hortilux-Blue lamps are used professionally in plant physiological research, and biotechnology/pharmacology industries. e-Ballast compatible Keeps plants compact putting more energy into flower production Exclusive HORTILUX Spectrum Used professionally in plant physiological research and biotechnology/pharmacology industries Bulb Orientation: Universal Made in the USA Environmentally Friendly: Lead Free Hortilux tests every Blue Metal Halide before it is ship.