A Glare Line Peeking Through the Cabinet Door Gap: How to Hide the Strip
- 2026-11-02 15:54
- /
- Arraystar LED
You mounted the strip at the front edge of the cabinet underside to light the counter, and now a bright line leaks around every closed door. It looks cheap, and no amount of dimmer fixes it. The strip needs to move back, or be hidden behind a baffle.
The bright line around every closed door
You can see it from across the room: a thin 3 mm bright yellow line running along the top of every closed cabinet door, right where the door meets the frame. It looks like a mistake, because it is. The strip is mounted too close to the front edge, so the LEDs themselves are visible through the 2 mm door gap. It shows worst at night, when the under-cabinet strip is the only light on. Dimming it down just makes the line dim; it never disappears.
Under-cabinet strip is supposed to wash the counter below, not shine itself through the door gap. The fix is not a dimmer. It is repositioning the strip 30 to 50 mm back from the front edge, or adding a small baffle that blocks the line of sight to the LEDs from standing eye height.
Where the strip should actually sit
The planning number I use is 30 to 50 mm back from the front edge of the cabinet, mounted on a small aluminium channel. From a standing position, eye height is about 1500 mm, the cabinet bottom is around 850 mm, and the counter is 900 mm. A strip set back 40 mm is hidden behind the cabinet lip from that viewing angle, but still throws light forward onto the work surface.
The viewing angles that matter
- Standing at the counter, eye height 1500 mm; the strip must be hidden from here.
- Sitting at a breakfast bar, eye height 1100 mm; check this angle too.
- From the living room across the room, the line is visible if the strip is at the lip.
Adding a baffle when the strip cannot move
Sometimes the cabinet underside is too shallow and you cannot move the strip back. Then you add a baffle: a 10 mm vertical lip screwed to the front edge of the cabinet underside, between the strip and the door gap. The lip blocks the line of sight. A small aluminium L-section works, painted to match the cabinet. You can also flip the strip to face the back wall, so the wash goes up the wall and onto the counter instead of out through the door gap.
The cheapest fix is repositioning; the baffle is the fallback.
| Fix | Cost | What it hides |
|---|---|---|
| Move strip 40 mm back | Free reposition | The direct LED view |
| Add 10 mm baffle lip | $5 per cabinet | The line of sight |
| Flip strip to rear wall | Re-tape | The glare, washes wall |
Choosing a strip that hides itself
A wide-angle bare strip throws light at 120 degrees, so even set back 40 mm it can leak through a gap. A strip inside a frosted silicone tube or extrusion diffuses the light, so there is no visible dot to leak. The diffused extrusion version also looks deliberate, like a designed light run, rather than a stuck-on strip.
Checking the leak from every angle
Before I sign off a cabinet run, I stand at the counter, sit on a stool, and step back three metres. If I can see a line from any of those angles, the strip moves again. I also switch the cabinet lights on and off with the room lights on, because the leak line is most visible in a dark kitchen, when the only light is the under-cabinet run.
- Set the strip 30 to 50 mm back from the front edge.
- Add a 10 mm baffle lip if the underside is too shallow.
- Check the leak standing, sitting, and from across the room.
Recommended Products
Frequently Asked Questions
Why is a bright line showing through my cabinet door gap?
Because the strip is mounted too close to the front edge, so the LEDs themselves are visible through the 2 mm gap when the door is closed. Dimming it down only makes the line dim. Move the strip 30 to 50 mm back from the edge, or add a small baffle lip to block the line of sight.
How far back from the edge should under-cabinet strip sit?
30 to 50 mm back from the front edge. From standing eye height, that hides the strip behind the cabinet lip while still throwing light onto the counter. Any closer and you get the leak line; any further back and you light the backsplash instead of the work surface.
Will a dimmer make the glare line go away?
No. A dimmer reduces the brightness of the whole run, but the line through the gap is still there, just dimmer. The only fixes are repositioning the strip back, adding a baffle lip, or diffusing the light inside a silicone extrusion. Dimming treats the symptom, not the cause.
What is a cabinet light baffle?
A 10 mm vertical lip fixed to the front edge of the cabinet underside, between the strip and the door gap. It blocks the line of sight so you cannot see the LEDs from standing height. A small aluminium L-section, painted to match the cabinet, works and is almost invisible.
Should the strip face forward or to the rear wall?
Face forward and down if you want task light on the counter. If the leak is a real problem, flip it to face the rear wall: the light washes up the backsplash and reflects onto the counter, and no line escapes through the door gap. It is a softer, more ambient look.
Need help with your LED project?
Get factory-direct pricing, free samples and engineering support within 24 hours.
Email: info@arraystarled.com | Phone: +86-0755-2103-6746 | WhatsApp: 0086 1581 8514 077
Need to size your power supply? Use our LED Strip Power Calculator to find the right driver in seconds.
