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. This lamp is for experienced growers who demand the highest quality plant production. The exclusive EYE HORTILUX BLUE spectrum provides high quality, natural-looking plants during ALL phases of plant growth. Manufactured in the USA; one-year warranty.