Motion-Activated Wall Switches

Select a switch based on load type (incandescent, LED, CFL, motor/ballast), coverage area and detection pattern, whether you need single-pole or 3-way wiring, and compatibility with existing dimmers or smart home systems

Verify the circuit voltage (typically 120V or 277V), that a neutral or ground is available if required by the device, the switch box size, and whether your circuit is single-pole or multi-location (3-way) so the switch matches the wiring

Many modern motion switches are rated for LED and low-wattage loads, but you must check the minimum and maximum load ratings and look for switching technology specifically listed as LED-compatible to avoid flicker or unreliable operation

Detection range and field of view, sensor type (passive infrared vs. ultrasonic or dual-technology), mounting height and placement, and adjustable sensitivity/time-out settings all influence accuracy and false positives

Look for switches specifically labeled for 3-way or multi-location use; these require compatible companion switches or specific wiring and will note companion requirements and wiring diagrams in product documentation

Choose devices that list compliance with relevant electrical standards (for example, UL or ETL listings) and follow local electrical codes for installation; when in doubt, have a licensed electrician install or inspect the wiring

After installation, adjust sensitivity, time-out, and ambient light settings as needed; periodically clean the sensor lens, check for loose wiring, and replace units if sensors degrade or stop responding appropriately