Recessed ceiling luminaire for use in concrete slab with rotationally symmetrical flood or wide flood optics, high colour reproduction, fixed orientation, adjustable depth mechanism for optical assembly. Combine with optical lens and anti-glare accessories for oval, wide spread, or diffuse beam control. High pressure die-cast powdercoated facade with snoot detail. Includes direct fast connector to remote driver. Active power factor correction, current regulation, voltage spike protection.