Under-cabinet lighting is the single highest-return lighting upgrade in a kitchen. It kills the shadow your own body casts when you work at the counter, turns the backsplash from a dark strip into a glowing feature, and makes a whole room feel finished at night. It is also the lighting people get wrong most often -- the wrong type glares off a glossy counter, the wrong color makes your cabinets look sickly, and the wrong placement leaves you working in your own shadow anyway. This guide walks the four decisions that get it right.

Pick the Type First: Puck, Strip, or Bar

There are really only three formats, and they solve different problems.

Linear bars (light bars). The best all-around choice and what most people want. These are rigid, low-profile strips of LEDs behind a diffuser that throw an even, continuous wash down the counter with no hot spots. They come in fixed lengths you link together, mount with screws or strong tape, and simply look the most built-in. Start here unless you have a reason not to.
LED tape (strip) lights. A flexible ribbon of LEDs on adhesive backing, cut to length, that hugs the underside of the cabinet. The most versatile and the easiest to run around corners or into odd spots -- but a bare strip creates a row of visible dots and a harsh reflection in a glossy counter. If you choose tape, buy a higher LED density (dots close together read as a line, not spots) and mount it inside a small aluminum channel with a frosted diffuser. That one accessory is the difference between "custom" and "dorm room."
Puck lights. Round, individual pools of light spaced along the cabinet. They give a pretty scalloped effect and are the simplest to install (many are battery or plug-in), but they light in circles, leaving darker gaps between them -- fine as accent light, less ideal as the even task light you want for chopping. Best for glass-front cabinets, a display niche, or a small run.

Get the Color Temperature Right

This is where good hardware still looks bad. Color temperature is measured in Kelvin: lower numbers are warmer (yellow), higher numbers are cooler (blue-white). For a kitchen counter you want 2700K to 3000K -- warm enough to feel like home and to flatter wood and warm-toned counters, bright enough to see clearly. Push past 4000K and food and cabinetry start to look clinical and gray. The critical rule: match the under-cabinet color to your other kitchen bulbs so the counter does not glow a different color than the ceiling. Also look for a high color-rendering index (CRI 90+), which is what makes fresh produce and your countertop's real color look accurate rather than washed out. Tunable-white fixtures that let you dial warm-to-cool are a nice hedge if you cannot decide.

How Bright, and How to Avoid Glare

Under-cabinet light is task light, so aim for roughly 175 to 300 lumens per foot of counter -- enough to read a recipe and see what you are cutting, not so much that it overpowers the room. Two things prevent the glare that ruins it: a diffuser (frosted lens or channel) so you never see the raw LED, and placement toward the front of the cabinet, which we cover below. If your counter is polished stone or high-gloss, diffusion matters even more, because a bare emitter will mirror straight back into your eyes. Finally, put it on a dimmer: full brightness for prep, low for a warm nightlight glow when the kitchen is closed.

How to Power It: Hardwired, Plug-In, or Battery

The wiring choice usually decides itself based on your walls and your appetite for work.

Hardwired. The cleanest look -- no cords, controlled by a wall switch or dimmer -- but it means running low-voltage wire and often a driver/transformer, ideally during a remodel or by an electrician. Best result, most effort.
Plug-in. The practical middle ground: bars and channels that link together and run to a single nearby outlet, hidden with cord covers. Great for a retrofit when you do not want to open walls, as long as you have an outlet in reach (an outlet inside a cabinet or a backsplash receptacle is ideal).
Battery or rechargeable. Stick-on pucks and slim bars, often motion- or tap-activated, with zero wiring. Perfect for renters, a pantry, or a glass cabinet -- just accept that you will recharge or swap batteries and that output is lower.

Where to Mount It

Placement is what separates even task light from a shadow line. Mount the fixture toward the front edge of the cabinet underside, not shoved against the wall -- front mounting throws light out over the whole counter, while a fixture pushed to the back lights the backsplash but leaves the front of the counter (where your hands are) in shadow. Many cabinets have a small lip or valance under the front that hides the fixture from view at eye level; use it. Center the light over the working depth of the counter, and for a long run, link fixtures end to end so the beam is continuous rather than a dotted line.

Common Mistakes

Bare LED tape on a glossy counter. No diffuser means visible dots and a mirror-glare headache. Use a channel with a frosted lens.
Cool white that fights the rest of the kitchen. A 4000K+ strip under warm 2700K ceiling lights makes the counter look like a hospital. Match your temperatures.
Mounting to the back of the cabinet. Lights the wall, shadows your work. Move the fixture forward.
No dimmer. Task-bright light is wrong for evenings. A dimmer doubles the fixture's usefulness.
Under-buying length. Gaps between short runs read as dead spots. Measure each cabinet run and light it end to end.

See It Glow in Your Own Kitchen First

Lighting is hard to picture from a product page, because the same fixture reads completely differently against your cabinet color, backsplash, and counter. Upload a photo of your kitchen and preview how warm under-cabinet light, different finishes, and backsplash options change the whole feel with Room Reveal before you buy or wire anything. For the surrounding decisions, see how to layer lighting in any room, how to choose a kitchen backsplash, and how to style open kitchen shelves, and browse modern kitchen ideas and Scandinavian kitchen ideas for the full look.

How to Choose Under-Cabinet Lighting: Puck vs. Strip vs. Bar, Color, and How to Power It