1 Buy = 6 Hortilux 600W Super HPS Grow Light Bulbs! Extend the growing season to 365 days a year with Eye Hortilux Super HPS 600W grow lamps. Choose Eye Hortilux lamps to raise your lighting system to a new level of performance, optimizing spectral energy levels that promote vigorous plant growth. The Hortilux Super HPS 600W Enhanced Spectrum grow lamps fine-tune your lighting system to give you the absolute plant growth. The Eye Super HPS EN Grow Lamps provide 17% more total energy and 25% more energy in the violet, blue, and green spectrum than standard high pressure sodium lamps. These lamps are environmentally friendly and pass EPA TCLP test criteria as non-hazardous waste. EN lamps are completely lead-free and contain less mercury than standard HPS lamps. The environmentally friendly lamps (EN) can usually be disposed of without being recycled; however, please check your state laws first, which may be more strict than federal law.