The highly reflective textured aluminum material offers excellent 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 in this fixture focus on the red component for increased photosynthetic response. They offer improved PAR values and increased PAR/lumen maintenance (up to 90% PAR at 10,000 hours of operation). Oversized design is excellent 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 is lightweight and easy to install. Does not accept glass.