The unique triangular shape of the FLEX ERA 3 lights can leave gaps when installed into enclosed locations like front bumpers with round cutouts. These shrouds are specifically designed to provide a gapless fit when installed into a 3.5 in round opening while still maintaining a sleek and minimal appearance. These shrouds clip onto the front outside lip of the FLEX ERA 3 lights for an incredibly quick install. With a tight and secure fit they snap on and are sure to stay put during your next overlanding or rock crawling adventure.Lux at 10 Meters: 800 lxOur Round Universal Shrouds for FLEX ERA(R) 3 Lights are intended to be used when installing FE3 lights into areas such as fog pockets on aftermarket bumpers. Think of these as our solution to mounting a triangular peg into a round hole.