Hortilux Ultra Ace Conversion MH-to-HPSExtend the growing season to 365 days a year with Eye HortiluxTM 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. 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,