The GLO T5 High Output (HO) Electronic Fluorescent Lighting System for 2 x 24 W or 2 x 39 W T5 HO bulbs comes fully assembled. Designed for maximum flexibility in meeting most aquatic and other lighting installations, it comes complete with a remotely-mountable electronic ballast, on/off switch, blue illuminated on/off indicator, bulb-mounting clips and quality, double-gasket, water-resistant end caps. The efficient electronic ballast is tuned to work best with GLO T5 HO bulbs for optimal light output and delivers maximum light emissions when combined with GLO T5 HO reflectors. This stylish, lighting system offers excellent mounting flexibility, maximum energy efficiency, low-heat output and safe, reliable, water-resistant end caps