For both residential and commercial use. Stylized knob provides dimming, on/off control and indication of light level setting. 6″ prestripped wire leads for fast, easy wiring. Ground lead provided. Wraparound heat sink dissipates heat and does not require de-rating. Longer strap increases wallboard contact area. ROTARY,3-WAY,600 Watt – 2 knobs. 120 Volt AC, 60 Hz. U.L. Listed.