Under Cabinet Lighting Placement: Where to Mount It and How Bright

Most kitchens end up with one of two problems. Either you see a row of hot dots reflected in the backsplash tile, or the front edge of the counter sits in your own shadow while the wall behind it glows. Both come down to under cabinet lighting placement rather than the fixture you bought. Move the same light strip three inches forward and the entire counter changes.

This guide covers where the light actually belongs on the cabinet bottom, how bright it needs to be for the counter surface you have, and the measurements worth checking before you drill anything.

The placement rule that fixes almost everything

Mount the light near the front of the cabinet bottom, roughly 2 to 3 inches back from the front edge. Not against the wall. Not centered.

The reason is simple geometry. Light from a strip spreads forward and down in a cone. When the strip sits at the front, that cone lands across the working half of the counter, which is exactly where your hands and your cutting board are. When the strip sits at the back, the brightest part of the cone hits the backsplash first, bounces off it, and leaves the front few inches of counter dim. You then stand in the remaining light and cast a shadow over your own work.

Front mounting also kills most glare complaints. Glossy subway tile and polished stone are mirrors. Point a bare light strip at them from 2 inches away and you get a bright reflected line at eye level.

Why the back position feels tempting anyway

Back mounting hides the fixture completely from someone standing in the room. That is the whole appeal, and it is a real trade: hidden hardware, worse light. The better fix is to keep the light at the front and hide it properly, either behind a thin light rail screwed to the cabinet edge or inside a shallow channel routed into the cabinet bottom. Many frameless cabinets already have a recess at the front for this.

Front, middle or back: what each position actually does

• 2 to 3 inches from the front edge. Best task light. Covers the front of the counter where you work, minimal backsplash glare. Visible from a seated position unless you add a lip or rail.
• Centered, around 6 inches back on a 12 inch cabinet. A compromise. Light is even but weaker at both the front edge and the backsplash. Fine for kitchens where the counter is mostly for show.
• 1 to 2 inches from the wall. This is accent lighting, not task lighting. It washes the backsplash beautifully in photos and leaves you chopping in shadow. Use it as a second layer, not your only layer.

If you genuinely want both, some kitchens run two strips: a front strip on a dimmer for working, and a back strip for evening ambience. It doubles the wiring, so decide before the backsplash goes on.

The measurements to check before you mount anything

Under cabinet lighting placement depends on the cabinet above it, so pull a tape measure out first.

• Cabinet height above the counter. Most upper cabinets sit 18 inches above the countertop. Lower than that and a front mounted strip can show in your eyeline; higher and the light spreads thinner. Our guide to kitchen cabinet dimensions covers the standard heights and when breaking them makes sense.
• Cabinet depth. Uppers are usually 12 to 13 inches deep. Your countertop is closer to 25 inches deep once you include the countertop overhang. That leaves about half the counter with no cabinet above it, which is another reason the light needs to throw forward.
• Fixture thickness. LED tape inside an aluminum channel usually adds about half an inch. Puck lights can be half an inch to a full inch. Check that the fixture will not sit below the bottom of the cabinet door and get knocked.
• Run length. Measure each cabinet section separately. Runs get broken up by range hoods, windows and tall pantry cabinets, and each gap needs its own plan.

How bright: think lumens per foot, not watts

Watts tell you about energy use, not output. For under cabinet task lighting, a commonly recommended target is roughly 300 to 500 lumens per linear foot of counter, with the higher end for detailed prep work.

The number you need inside that range depends almost entirely on your counter color. A white quartz top bounces a lot of light back up at you. Honed black granite, soapstone and dark walnut absorb it. The same strip that feels bright over white can feel weak over dark stone, so if your counters are dark, buy toward the top of the range and add a dimmer rather than wishing later.

Color temperature and color accuracy

• 2700K matches the warm bulbs in most homes. Safest choice if your other kitchen lighting is warm.
• 3000K is the flexible middle. Warm enough to feel like home, crisp enough to see what you are doing.
• 4000K and up reads clinical next to wood cabinets and warm brass. It suits very cool, white, modern kitchens and almost nothing else.

Color rendering matters more than people expect here. CRI 80 is the usual baseline for LED strips, and CRI 90 or higher is worth paying for in a kitchen, because this is the light you judge raw chicken, ripe avocado and paint samples under.

How long should the light be

Cover at least two thirds of each cabinet run and center it. A 36 inch cabinet wants a light at least 24 inches long. Short lights leave scalloped pools with dark gaps between them, and because the counter is a flat reflective plane, those gaps are far more obvious than they look in the store display.

Tape, linear bars or pucks

• LED tape in an aluminum channel. The most even light and the thinnest profile. It needs a separate driver, careful cutting and a plan for where the wire exits. Most work, best result.
• Linkable linear bars. Rigid fixtures that chain together with short jumper cables. Much easier to install, with faint seams where sections meet. A good middle option for a retrofit.
• Puck lights. Cheapest and quickest. They create visible circles of light on the counter and obvious dot reflections in a glossy backsplash. Reasonable over a sink or a short 18 inch section, poor across a long prep run.

Plan the wiring before you buy the light

This is where most do it yourself installs stall. Decide three things first.

• Where the driver lives. Low voltage tape needs a transformer somewhere. Inside a base cabinet, above the uppers, or in the toe kick all work. It needs air around it and access for replacement.
• How it switches. A wall switch on a dimmer is worth the extra effort. Battery powered stick on lights are the ones people quietly stop replacing batteries in.
• How the wire gets there. Behind a cabinet, through the back panel and down a corner is the clean route. If the backsplash is already tiled, a surface mounted channel along the cabinet front is the least destructive option.

Treat these lights as one layer of three. Ceiling light does general illumination, under cabinet lighting does task work, and pendants do the island. If you are planning the whole room, our notes on recessed lighting spacing and pendant light height over an island cover the other two layers.

Mistakes worth avoiding

• Mounting at the back because it hides better, then wondering why prep work is in shadow.
• Skipping the dimmer. Task brightness at 10pm is unpleasant and it is the main reason people stop using these lights.
• Pucks over a long run. The scallops never stop bothering you.
• Buying a kit before measuring each cabinet section, then discovering the run you needed is 42 inches and the kit maxes out at 36.
• Mixing color temperatures. A 4000K strip under 2700K ceiling lights makes the counter look green.
• Using a bare strip with no diffuser against glossy tile. The diffuser is what turns dots into a line of light.

Frequently asked questions

Should under cabinet lights go at the front or back of the cabinet?

The front, about 2 to 3 inches back from the cabinet edge. Front mounting throws light across the part of the counter you actually work on and keeps the brightest part of the beam off a reflective backsplash. Back mounting looks tidier but turns a task light into a wall wash.

How many lumens do I need for under cabinet lighting?

Roughly 300 to 500 lumens per linear foot of counter is a common target for task lighting, and detailed prep work sits at the upper end. Dark counters absorb more light, so choose a brighter strip and control it with a dimmer instead of buying a dim one you cannot boost.

What color temperature is best for under cabinet lighting?

3000K suits most kitchens, and 2700K is better if the rest of your lighting is warm. The more important spec is color rendering: look for CRI 90 or higher so food and finishes look the way they should.

Can I add under cabinet lighting if my cabinets have no bottom lip?

Yes, but the fixture will be partly visible from a seated height. Either accept it and choose a slim channel in a finish that matches the cabinet, or screw a thin light rail along the front edge of the cabinet bottom to hide the strip behind it. A rail about three quarters of an inch deep is usually enough.

How far apart should puck lights be under cabinets?

Space them so the pools of light just overlap, which usually means every 10 to 12 inches on a standard counter height, and keep them all the same distance from the cabinet front. Even then, expect visible scallops. If an even line of light matters to you, continuous tape or linear bars are the better buy.

The short version

Front of the cabinet, 2 to 3 inches back from the edge. Cover two thirds of the run. Aim for 300 to 500 lumens per foot, warm at 2700K to 3000K, CRI 90 or better, and put it on a dimmer. Get those five things right and under cabinet lighting stops being a decorative afterthought and starts being the light you reach for every day.