With the enormous popularity of the original D-Series came the need for a slightly larger, more powerful lighting solution. The RIGID Dually XL PRO boasts more light than ever before in a housing that measures 4"x4". Recent improvements to the LEDS in the Dually XL Series PRO improve light output to up to 9,504 raw lumens while maintaining the efficiency that is the hallmark of the entire RIGID product line.