Cooper Lighting Accurus ACT954 is a remodel housing lighting fixture designed for indoor use. It requires a 4-3/16 inch diameter opening in the ceiling and can accommodate a variety of trims, including the ACT2385 which requires a 50W AR70 12V lamp, and all other Accurus trims which require a 50W Max MR16 12V lamp. The fixture is thermally protected, so blinking light may indicate overheating. It is important to follow the installation instructions carefully to avoid electrical shock and ensure proper operation.