The TWR2 LED ALO is a versatile and energy efficient LED wall pack for replacing anything from 150 to 400 W metal halide wall packs, while saving up to 82% in energy costs. Offering an expected service life of 20 years, the TWR2 LED eliminates frequent lamp and ballast replacements associated with traditional technologies. The adjustable light output (ALO) feature allows the contractor to set the light output during installation, to a level best suited for the job site.