A screw-in motion sensor is an easy, no-rewire way to add motion control to an existing light.

1. Power off: Turn the wall switch off. If you’re unsure or touching wiring, switch off at the breaker.
2. Remove the bulb: Let it cool, then unscrew.
3. Install the adapter: Screw the motion sensor into the E26/E27 socket, hand-tight.
4. Reinstall a compatible bulb: Check the sensor’s wattage and bulb-type limits.
5. Set preferences: Adjust sensitivity, time delay, and dusk-to-dawn if available.
6. Restore power and test: Walk through the area and fine-tune aim or settings.

For outdoor use, choose an outdoor-rated sensor. If you prefer a wired wall/fixture sensor, consider a licensed electrician.

A few quick checks can help narrow it down:

• Power and switch: Confirm the circuit and wall switch are on; reseat the bulb and sensor.
• Ambient light: Many sensors won’t activate in daylight. Cover the sensor briefly or test at dusk.
• Settings: Increase sensitivity and extend the time delay; ensure it’s not in “off” or “manual” mode.
• Aim and obstructions: Re-aim the head; clear plants or objects blocking the sensor.
• Bulb/circuit compatibility: Some sensors don’t work on dimmers or with certain bulb types. Check the instructions.
• Solar models: Verify the panel is in direct sun, clean, and the battery has charged.

If issues persist, a simple power cycle and a quick review of the manufacturer’s guidance can help.

Most screw-in and outdoor motion lights use one of two sensor types:

• PIR (Passive Infrared): Detects heat movement from people, pets, or cars. It typically requires line of sight, making it a solid choice for porches, entries, and hallways with fewer false triggers from outside the coverage area.
• Radar/Microwave: Uses low-power waves to detect motion, often offering broader, 360° coverage and sensitivity to subtle movement. It can detect through some thin materials, which may increase unwanted activations if aimed toward busy areas.

Choosing between them depends on your space: PIR for focused zones; radar for wide, all-around coverage. Placement and environment can affect performance.

Match the light to your space and climate:

• Power source: Pick solar for wire-free installs, screw-in sensors for existing sockets, or hardwired for permanent setups.
• Brightness and coverage: Check lumens, beam spread, and adjustable heads for wide angles (some reach around 270°).
• Weather rating: Look for outdoor/IP ratings (such as IP65) for rain and dust.
• Detection: Review range, detection angle, and sensor type (PIR or radar).
• Controls: Time delay, sensitivity, dusk-to-dawn, and remote options add flexibility.
• Light quality: Choose a preferred color temperature (warm to daylight).

Comparing specs and customer reviews can help. You can also choose convenient pickup or delivery options at checkout.

E26 and E27 screw bases are very similar in size, so many motion sensor adapters and bulbs can physically fit either socket. A few things to confirm:

• Voltage: E26 is common in North America (typically 120V), while some E27 products target 220–240V regions. Verify the voltage on the label.
• Ratings: Match indoor/outdoor and temperature ratings to your location.
• Wattage and bulb type: Stay within the adapter’s limits and approved bulb types.
• Clearance: Ensure there’s space in the fixture for the sensor and bulb.

When in doubt, choose a model specifically rated for your socket type and local voltage for best results.