These kits are uniquely designed to fit an abundance of 1' x 4', 2 x 2 and 2 x 4 LED and fluorescent recessed troffers in both standard and emergency versions. They specifically accommodate Metalux, Fail-Safe, Corelite and Neo-ray product lines in addition to other manufacturers offerings. Their three piece construction provides a simple means of installing a recessed fixture in any surface mount application while reducing labor time and associated costs. With its clean and simple design its ideal for providing spaces with an aesthetically pleasing solution. The result is an innovative and user-friendly accessory for addressing surface mount applications with an array of fixture choices.