Cooper Lighting SLD405930 LED Downlight, 120 V, 12 W, 50/60 Hz, LED | Halo SLD surface LED downlight luminaires incorporate WaveStream LED technology to create an ultra-low-profile, surface-mounting luminaire with the performance and look of traditional downlights. The SLD Series offers unparalleled design freedom with mainstream value. The SLD4 and SLD6 luminaires are designed for installation in many 3-1/2 in and 4 in electrical junction boxes and may be retrofit in 4 in, 5 in or 6 in aperture IC and non-IC recessed housings.