RT5 is designed for applications that require the extremely energy efficient delivery of comfortable volumetric light from a lay-in fixture that is appealing and shallow in depth. Ideal for offices, schools, hospitals, retail and numerous other commercial applications. Certain airborne contaminants can diminish integrity of acrylic. Construction: Impact modified acrylic prismatic refractor with polymer light-diffusing film. Rugged, one-piece, cold-rolled steel reflector with embossed facets. Polyester powder paint after fabrication. Rigid structure with ballast box and endplates with integral T-bar clips. Fixtures may be mounted end-to-end. Optics: Delivers volumetric lighting by filling the entire volume of space with light, delivering the ideal amount to walls, cubicles, work surfaces and people. Luminous characteristics are carefully managed at high angles, providing just enough intensity to deliver the volumetric effect. Regressed, two-piece refractive system obscures and softens the lamp and smoothly washes the reflector with light. Linear faceted reflector softens and distributes light into the space and minimizes the luminance ratio between the fixture and the ceiling. Mechanical cut-off across the reflector and fresnel refraction along the refractor provide high angle shielding and a quiet ceiling. Sloped endplates provide a balanced fixture to ceiling ratio while enhancing the perception of fixture depth. Electrical: Highly efficient program-start electronic ballasts, Class P, thermally protected, resetting, HPF, non-PCB, UL Listed, CSA Certified, sound rated A. Your choice of Premium or Premium XP T5 lamp with enhanced phosphors and 85 CRI. Ballast/lamp efficacy up to 100+ LPW. Lamp is TCLP compliant. 0.90 or 0.95 ballast factor standard for typical applications. 1.15 ballast factor or F54T5HO lamping available for higher ceiling height applications. Step-level dimming option allows system to be switched to 50% power for compliance with common energy codes while maintaining fixture appearance. S5 option available for use with SIMPLY5™ Lighting Intelligence system with multi-level dimming. See SYNERGY® Lighting Controls specification sheets for more information. Ballast Disconnect provided standard where required to comply with U.S. and Canadian electrical codes. Installation: Side mounted ballast tray accessed by removing adjacent ceiling tile. Ballast tray may be removed from fixture during service. Lamps accessed by squeezing refractor to release from retention tabs. Listing: UL Listed (standard). Optional: Canada CSA or cUL. Mexico NOM.