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]® TECHZONE™ Ceiling System Recessed Fixtures L/THON/A LIGHTING' Armstrong® TechZone™ Compatible TZ5 48" and 60" Lay-in and Tegular Fixtures for 9/16" and 15/16" Grid The TZ5 applies the Volumetric Lighting principal to the Tech Zone. It creates shadow-less lighting with controlled high angle brightness. The result makes spaces more attractive and facial features more well-defined and lively. The diffuser is an extruded flat lens backed with an optical overlay designed to control brightne