A burned-out motion sensor on an otherwise good floodlight is one of those quietly annoying problems. The fixture still works, the wiring is fine, but the sensor head has given up. Replacing the whole floodlight feels wasteful, so a swap-in sensor is the smarter move. The four options below come from one manufacturer and cover the common scenarios: a standard white unit, a UL-listed white model with stepless time tuning, plus brown and black finishes for homes where plain white clashes with trim or siding.
The Choices Worth Comparing
Treewell 240° Replacement Motion Sensor (White)
Treewell 240° Replacement Motion Sensor, UL Listed (White)
Treewell 240° Replacement Motion Sensor (Brown)
Treewell 240° Replacement Motion Sensor (Black)
More Details On Our Top Picks
A replacement sensor like this only earns its keep if it slots into your existing fixture without fuss and behaves the way you expect it to. The Treewell white unit pairs a 240-degree detection arc with a 60-foot reach, which covers most driveway, side-yard, and porch placements. Three operating modes handle the everyday scenarios: motion-triggered at night, dusk-to-dawn always-on at night, and a manual override that holds the light on for roughly eight hours before releasing at sunrise.
For most homes, that mix is genuinely useful. The LUX dial, where LUX measures the ambient light level the sensor reads before triggering, sweeps from 5 to 300, so you can ignore passing cars on a lit street or fire the light at the faintest hint of dusk in a quiet cul-de-sac. Detection sensitivity is independently adjustable too, which helps when small animals keep tripping the fixture.
Practical Advantages
- Three modes cover motion, dusk-to-dawn, and an 8-hour manual hold for parties or projects.
- Wide 240-degree arc and 60-foot reach handle larger yards and driveways in a single head.
- Adjustable sensitivity helps tame false triggers from pets and blowing branches.
- Independent LUX and time dials let you fine-tune behavior without trial-and-error swaps.
Things To Consider
- It is a replacement head, not a full floodlight, so it only helps homes with a compatible existing fixture.
- Fine-tuning three knobs takes a ladder trip or two before the timing feels right.
Built With In Mind
Homeowners replacing a worn sensor on a white vinyl or aluminum-sided home who want a tunable, no-fuss swap.
Consider Something Else When
Treewell 240° Replacement Motion Sensor, UL Listed (White) suits installations where a UL listing is required by local code.
The Treewell UL-listed model does the same basic job as the first pick but leans toward people who need paperwork-friendly hardware. The UL mark, short for Underwriters Laboratories, means the unit has been tested against a recognized U.S. safety standard, which matters for permits, insurance, and the occasional picky inspector. The detection footprint matches: 240 degrees of coverage and a range that stretches up to 60 feet depending on how the sensitivity knob is set.
Where it differentiates itself is the stepless timer dial, meaning the time knob turns smoothly through its full range rather than clicking at fixed positions, so you can dial from 10 seconds up to 10 minutes in small, repeatable increments. The same three-mode lineup (Auto, dusk-to-dawn, and an 8-hour manual hold) is present, and in our view that flexibility is the real reason to pick this version over a bare-bones replacement.
A Favorable Mix
- UL listing helps when an inspector, an HOA, or an insurance policy expects certified hardware.
- Stepless time dial lets you set run-on between 10 seconds and 10 minutes without clicking through presets.
- Three modes plus adjustable sensitivity cover most residential entry and yard layouts.
Points To Note
- The white-only finish can look out of place on darker siding or stained timber trim.
- It is still a sensor head, so the rest of the fixture (lamp, housing, mounting plate) has to be in working order.
Key Specs
Who Should Grab It
Homeowners in jurisdictions that ask for a UL mark, or anyone who simply prefers certified components and stepless time control.
Look Elsewhere When
Treewell 240° Replacement Motion Sensor (Black) is the better fit when dark fixtures on modern trim need a matching finish.
The brown version is functionally identical to the white Pick 1 but solves a very specific visual problem. On stained cedar, walnut-toned composite siding, or earthy stucco, a stark white sensor head becomes the loudest thing on the wall. Brown housing disappears into the background instead, which is the whole reason the finish exists.
The internals carry over: 240-degree sweep, up to 60 feet of detection range, three operating modes, and the same 5 to 300 LUX adjustment so the light only triggers at the ambient brightness you choose. For most homes with wood-tone exteriors, this is a small but meaningful upgrade in curb appeal.
Positive Takeaways
- Brown finish blends with stained wood, composite siding, and earthy exterior palettes.
- Same flexible 5 to 300 LUX range helps ignore streetlights and porch floods.
- Manual override mode holds light on for 8 hours, which is useful for outdoor dinners.
- Independent sensitivity and time dials give real control over false triggers.
Worth Noting
- Brown can read as a mismatched blob against bright white trim, so check the contrast at your mounting spot.
- Like the other Treewell units, it is a sensor head only, not a complete floodlight.
The Right Fit
Owners of homes with wood-grain, log, or earth-tone siding who want the sensor to disappear visually rather than stand out.
Skip It When
Treewell 240° Replacement Motion Sensor (White) is the smarter match when the surrounding trim and soffits are already bright white.
Black is the finish most often skipped, yet it is the one that makes the most sense for contemporary homes with dark window frames, matte fixtures, or charcoal-toned soffits. The Treewell black sensor matches that aesthetic and keeps the visual line clean around modern floodlight bodies.
Under the hood, it carries the same 240-degree detection, 60-foot reach, and three-mode layout as the rest of the family. The LUX knob still sweeps across a wide ambient-light range, and you may find the sensitivity dial worth a couple of test walks after installation to settle on a comfortable reach.
Real Benefits
- Black housing pairs cleanly with modern dark-trim exteriors and matte fixtures.
- Adjustable sensitivity dials back nuisance triggers from small animals and street traffic.
- Same reliable 8-hour manual override for gatherings or late-yard work.
Trade Offs
- Black absorbs more heat in direct sun, which can shorten the visible life of plastic finishes over many seasons.
- It still relies on a compatible existing fixture for the lamp and mounting base.
Whose Shelf It Belongs On
Homeowners with modern, dark-trim exteriors who want the sensor to look intentional rather than tacked on.
Reach For A Different Pick When
Treewell 240° Replacement Motion Sensor (Brown) suits warm-toned wood siding far better than a black housing would.
Picking A Replacement Sensor That Actually Fits
The right sensor head depends less on brand and more on three honest questions: what does the existing fixture need, what behavior do you actually want from the light, and how does the finish look on the wall.
Match The Mounting First
These are all replacement heads, not full floodlights, so the body has to accept the new sensor without rewiring. Before anything else, confirm the wiring lead, the gasket style, and the mounting hole pattern on the current fixture match the new head. A loose fit is the most common reason a swap fails, and it is rarely the sensor’s fault.
Tune The Behavior You Want
PIR sensing, where PIR stands for Passive Infrared, detects the heat signature of a moving person or animal rather than relying on visible movement, so the angle and reach matter as much as the lighting. A 240-degree arc handles driveways and broad side yards; a tighter 120-degree head suits narrow paths. Sensitivity and timer knobs are the levers that decide whether the light feels helpful or annoying, so budget a few nights of tweaking before judging performance.
Finish And Placement
A white sensor reads as deliberate on white siding and oddly placed on dark trim, while brown and black finishes solve specific palette problems. Consider where the head sits relative to the fixture body: a mismatched finish is much more visible on a low, eye-level mount than on a second-story eave.
Key Considerations Across These Picks
Common Shopping Slip Ups
Treating a replacement sensor like a full floodlight is the most common error. These heads need a working fixture, lamp, and wiring to attach to, and they will not fix a dead fixture on their own. Another trap is ignoring the existing finish, then living with a glaring white blob on a dark wall for years. Measure the wall color, check the housing style, and confirm the gasket fit before committing.
Where The Extra Money Goes
The premium in this category usually buys a UL listing and finer-grained timer control, like the stepless dial on the white UL-listed model. That matters when local codes require certified components, or when you want the light to behave subtly rather than clunk through preset time steps. For a basic driveway swap where appearance and behavior are already working, the lower-priced white or brown head is plenty.
Frequently Asked Questions
What is a 240-degree motion sensor?
A 240-degree motion sensor covers a wider arc than the common 120-degree head, watching roughly two-thirds of a full circle. That wider field means fewer blind spots at corners and driveways.
Can these replace any brand of floodlight sensor?
These are universal-style replacement heads, but the original fixture must accept the same wiring lead and mounting footprint. Confirm gasket style and hole pattern before installation to avoid a loose fit.
What does the LUX adjustment actually do?
The LUX knob sets how dark the surroundings must be before the sensor triggers the light. A lower number means the light fires in brighter ambient conditions, while a higher number restricts activation to deeper dusk or full night.
What is the difference between Auto Mode and dusk-to-dawn mode?
Auto mode only fires the light when motion is detected during low-light conditions, while dusk-to-dawn mode keeps the lamp on continuously through the night regardless of motion. Auto saves energy; dusk-to-dawn gives constant illumination.
Do these sensors work in cold or wet weather?
The units are designed as outdoor motion detectors for security floodlights, so the housings handle typical rain and seasonal temperature swings. Extreme cold can briefly slow PIR response at the very low end of its range.
Closing Thoughts
A replacement motion sensor head is a small, sensible upgrade when the rest of the floodlight still has years left in it. Pick the finish that matches the wall, confirm the fit, and spend an evening dialing in the sensitivity and LUX so the light behaves the way you want. From there, the right pick is simply the one that suits the home’s exterior and the installer’s checklist.