SignBOX 3 Slim packs the power and performance of SignBOX 3 into a slim and highly efficient package designed for shallow, double-sided light boxes. Featuring micro-prism lens technology for bright, uniform illumination and wider spacing in new or retrofit sign cabinets, SignBOX 3 Slim creates the perfect grid of light for optimum, even illumination, and fast, easy installation with fewer power supplies, making it the bright choice for your sign lighting needs.