Wedge SLUltra Thin. Ultra Modern. Slimmed to Perfection. The Wedge SL is a high performance inspection light designed for pocket carry. Its outfitted with an aluminum tail switch for momentary, constant on and THRO (Temporarily Heightened Regulated Output) modes. Features Two Available Lighting Modes: Constant on and THRO (Temporarily Heightened Regulated Output) mode for maximum brightness THRO: 500 lumens; 80m beam Constant On (High): 100 lumens; 35m beam;