LED DownlightsSurface Mount
Portor Lighting PT-DMS-4I-10W-5CCT LED Downlight Manual
Setup, everyday use, maintenance and troubleshooting for the 4 in. surface-mount LED downlight, with verified specifications.
- Light output820 lumens
- Power10 W
- Efficacy82 lm/W
- Color temp.2700–5000K (selectable)
About the Portor Lighting PT-DMS-4I-10W-5CCT
The Portor Lighting PT-DMS-4I-10W-5CCT is a 4 in. surface-mount LED downlight certified under the ENERGY STAR program for light fixtures. It produces 820 lumens from 10 W of input power, an efficacy of 82 lumens per watt.
Light quality: the fixture offers selectable color temperatures of 2700K, 3000K, 3500K, 4000K, or 5000K and a color rendering index of 96, which renders skin tones, wood and fabrics accurately.
Notable features include continuous dimming, a wet-location rating, a built-in occupancy sensor, and smart connectivity over PIR Motion Sensor. The rated light-source life is 102,000 hours.
Specifications
| Brand | Portor Lighting |
|---|---|
| Model number | PT-DMS-4I-10W-5CCT |
| Model name / series | 4’’ LED Closet Light with PIR Motion Sensor |
| Fixture type | Surface Mount |
| Nominal size / aperture | 4 in. |
| Light output | 820 lumens |
| Input power | 10.0 W |
| Efficacy | 82.0 lm/W |
| Color temperature(s) | 2700K, 3000K, 3500K, 4000K, 5000K |
| Color rendering index (CRI) | 96 |
| Rated light-source life | 102,000 hours |
| Power factor | 0.89 |
| Continuously dimmable | Yes |
| Location rating | Wet location |
| Indoor / outdoor use | Indoor |
| Tunable / selectable white | Yes |
| Full-color tunable | No |
| Selectable light output | No |
| Occupancy sensor | Yes |
| Connected (smart) capable | Yes |
| Connectivity | PIR Motion Sensor |
| Standby power | 0.5 W |
Safety information
- Turn off power at the circuit breaker — not just the wall switch — before installing, removing or servicing the fixture, and confirm the circuit is dead with a non-contact voltage tester.
- Installation must comply with the National Electrical Code (NEC) or Canadian Electrical Code (CEC) and local codes. Many jurisdictions require a licensed electrician and a permit for new fixture locations or new wiring; if you are not comfortable with household wiring, hire one.
- Use only the junction box, housing, or mounting hardware specified in the installation instructions, and do not exceed the box-fill limits of the junction box.
- Install the fixture only on a circuit whose voltage matches the label, and never modify the LED driver or module.
- Connect dimmable fixtures only to dimmers the manufacturer lists as compatible, and keep the total connected LED load within the dimmer's LED rating (often much lower than its incandescent rating).
Installation and first-time setup
Surface-mount downlights fasten directly to a ceiling junction box (and in many cases can also be attached to an existing recessed can, using an adapter if the instructions allow), so no cutout or attic access is needed. Its nominal size is 4 in.; make sure the fixture body will fully cover the junction box or can opening it mounts over.
- Check the box
Confirm there is a securely fastened, code-approved junction box at the location — a fixture cannot be wired to loose cable in the ceiling.
- Turn off power
Switch off the breaker and verify the circuit is dead.
- Mount the bracket
Screw the supplied mounting bracket to the junction box using the box's screw holes.
- Wire the fixture
Connect black (line) to black, white (neutral) to white and bare or green (ground) to the box ground, using listed wire connectors. Fold the wires neatly into the box.
- Set options and secure
Select the color temperature on the fixture's switch, then attach the fixture to the bracket, making sure it seats flat against the ceiling.
- Restore power and test
Turn the breaker on and test the fixture and dimmer, if used.
Because this fixture is wet-location rated, it is suitable for locations exposed to water, such as covered porches, eaves and shower areas where the manual permits. Code requires fixtures within 3 ft horizontally and 8 ft vertically of a tub rim or shower threshold to be rated at least for damp locations — wet-location rated where subject to shower spray — and a GFCI-protected circuit is often required in these areas.
Using your downlight
Dimming
The fixture dims continuously. Check the manufacturer's compatibility list: most LED drivers work best with trailing-edge (ELV) or LED-rated dimmers, and some dimmers have a low-end trim adjustment that stops flicker at the bottom of the range.
Choosing a color temperature
This fixture can be set to 2700K, 3000K, 3500K, 4000K, or 5000K. Set every fixture in a room to the same setting — mismatched color temperatures are very noticeable.
| Setting | Appearance | Typical use |
|---|---|---|
| 2700K | Warm white, similar to incandescent | Living rooms, bedrooms, dining areas |
| 3000K | Soft warm white, similar to halogen | Kitchens, living spaces, hospitality |
| 3500K | Neutral warm | Kitchens, retail, offices |
| 4000K | Neutral / cool white | Offices, laundry rooms, garages |
| 5000K | Cool white, daylight-like | Workshops, garages, task areas |
Smart control
This fixture is connected-capable and communicates over PIR Motion Sensor. Pair it with the manufacturer's app before mounting it if possible, leave the wall switch on so the fixture stays reachable, and use schedules or scenes instead of cutting power at the switch. Its listed standby power while waiting for commands is 0.5 W.
Built-in sensors
The built-in occupancy sensor turns the light on when motion is detected and off after a set time-out; keep the sensor lens clean and unobstructed.
Light output and placement
At 820 lumens, this fixture is in the typical range for general lighting in kitchens, living areas and offices with 8–9 ft ceilings. LED fixtures reach full brightness instantly and are not shortened by frequent switching.
Care and maintenance
| When | What to do |
|---|---|
| Every 3–6 months | Dust the trim and lens with a soft, dry microfiber cloth with the light off and cool. Do not spray cleaner directly onto the fixture. |
| Every year | Check that the fixture is still tight against the ceiling and the mounting bracket screws are snug. |
| When cleaning greasy kitchens | Wipe the lens with a cloth dampened in mild soapy water, then dry it. Avoid solvents and abrasive pads, which can cloud the lens. |
| Every year (outdoor/damp areas) | Look for insects, moisture or corrosion behind the trim and confirm any gaskets are intact. |
| Every 6 months | Clean the sensor window gently and confirm the sensor still switches the light correctly. |
| As released | Install firmware updates from the manufacturer's app; they can fix connectivity and dimming issues. |
The integrated LEDs are not user-replaceable bulbs. The rated light-source life of 102,000 hours works out to roughly 93 years at 3 hours a day, or about 23 years at 12 hours a day. Over time the LEDs gradually dim rather than burning out; when output becomes too low, or if the driver fails, replace the fixture or LED module as the manufacturer directs.
Troubleshooting
Most downlight problems trace back to dimmer compatibility or wiring connections. Always turn off the breaker before opening the fixture or the junction box.
| Problem | Possible cause | What to try |
|---|---|---|
| Light does not turn on | Breaker off or tripped; loose wire connection; switch or dimmer failure. | Check the breaker; with power off, confirm connections in the junction box are tight; test with a standard switch. |
| Flickers or buzzes when dimmed | Dimmer not compatible with the LED driver; dimmer low-end trim set too low; too many or too few fixtures on the dimmer. | Use a dimmer on the manufacturer's compatibility list; adjust the dimmer's low-end trim; keep the load within the dimmer's LED rating. |
| Faint glow when switched off | Illuminated or smart switch leaking a small current; shared neutral wiring issue. | Try a standard switch; use a smart switch that has a neutral connection; have an electrician check the wiring. |
| Does not dim smoothly or turns off at low settings | Dimmer range not matched to the driver. | Raise the dimmer's minimum setting; consult the dimmer and fixture compatibility notes. |
| Color looks different from the other fixtures | Color-temperature selector set differently from neighboring fixtures. | Turn off power, check the selector setting and match it to the other fixtures. |
| Fixture pulls away from the ceiling | Mounting bracket loose; junction box not secured to framing. | Turn off power and tighten the bracket screws; have the box secured if it moves. |
| Turns off by itself after running a while | Driver overheating, often from insulation packed around a fixture or a loose connection. | Turn off power and check the installation. Do not cover Non-IC fixtures with insulation; call an electrician if the problem continues. |
| Moisture inside the lens | Gasket not seated; fixture exposed to more water than its rating allows. | Turn off power, dry the fixture and reseat the gasket; replace with a wet-rated fixture if needed. |
| App cannot find the light | Wall switch turned off; out of wireless range; network credentials changed. | Turn the switch on; move the hub or router closer; reset and re-pair following the manual. |
Energy use and running costs
The Portor Lighting PT-DMS-4I-10W-5CCT draws 10 W. Used 3 hours a day — a typical home assumption — it consumes about 11.0 kWh a year, roughly $1.86 per year at an electricity price of $0.17 per kWh. In a commercial space lit 12 hours a day, the same fixture uses about 44 kWh, or $7.45 a year.
Efficacy — lumens of light per watt of electricity — is the best single measure of a fixture's efficiency. This model delivers 82 lm/W.
| Daily use | Energy per year | Cost per year |
|---|---|---|
| 1 hour | 3.7 kWh | $0.62 |
| 3 hours | 11.0 kWh | $1.86 |
| 6 hours | 21.9 kWh | $3.72 |
| 12 hours | 43.8 kWh | $7.45 |
The listed power factor is 0.89.
Dimming reduces power roughly in proportion to light output.
Frequently asked questions
How bright is the Portor Lighting PT-DMS-4I-10W-5CCT?
It is rated at 820 lumens while drawing 10 W, for an efficacy of 82 lumens per watt.
Is the Portor Lighting PT-DMS-4I-10W-5CCT dimmable?
Yes. It is continuously dimmable. Use a dimmer the manufacturer lists as compatible for flicker-free operation.
What color temperature is the Portor Lighting PT-DMS-4I-10W-5CCT?
It is selectable between 2700K, 3000K, 3500K, 4000K, and 5000K. Set the selector before installation.
What size is the Portor Lighting PT-DMS-4I-10W-5CCT?
Its nominal size is 4 in. Confirm the exact cutout or housing dimensions in the manufacturer's installation sheet before purchasing.
Can I install the Portor Lighting PT-DMS-4I-10W-5CCT in a bathroom or shower?
It is wet-location rated, so it can be used where it may be exposed to water, including shower areas where the instructions permit. Follow local code for GFCI protection.
How much does it cost to run the Portor Lighting PT-DMS-4I-10W-5CCT?
At 3 hours a day and $0.17/kWh, it costs about $1.86 a year to operate.
Sources and disclaimer
Specifications on this page come from the ENERGY STAR certified led downlights dataset published by the U.S. Environmental Protection Agency (record certified January 9, 2025), retrieved October 7, 2026.
The setup, operating, maintenance and troubleshooting guidance is written by ManualHarbor's editors for this specific product type and configuration. It is an independent guide — not a reproduction of the manufacturer's manual — and ManualHarbor is not affiliated with Portor Lighting. Always follow the safety instructions, installation requirements and warranty terms supplied with your unit, and contact Portor Lighting or an authorized service provider for warranty repairs and replacement parts.
Running-cost figures use assumed U.S. average utility prices and are estimates for comparison only. See our editorial methodology for details.
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