Made specifically for double-ended horticulture lamps (not included). Features German made, 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). The Super Sun® DE’s compact & efficient design delivers maximum light to your growing space. 95% reflective textured German aluminum interior for excellent uniformity, output and diffusion. Galvanized steel housing with durable powder coated finish. Manufactured with exacting standards and the finest quality components. US Patent: D726,116. US Patent Pending: 29/520,168. Chinese Patent: ZL201330582324.7.