Made specifically for double-ended horticulture lamps (not included). The highly reflective textured aluminum subject material offers superb reflectivity, output and diffusion. Includes UL listed double-ended sockets. Unique double-ended construction allows for maximum optical efficiency and uniformity. Improved spectrum DE lamps used on this fixture center of attention at the red component for increased photosynthetic response. They provide improved PAR values and increased PAR/lumen maintenance (as much as 90% PAR at 10,000 hours of operation). Oversized design is very good for larger growing areas and closer placement to plant canopy. Sun System® 15 foot lamp cord is compatible with Hard Core® DE or Sun System® 1, Galaxy® and other electronic DE ballasts. Fixture easily assembles in minutes. It’s lightweight and easy to put in. Does not accept glass.