Kitchen Task Lighting: An Under-Cabinet Lighting Guide

Kitchen task lighting is the bright, focused light aimed at the places where you actually work: the counters, the sink, the cooktop and the island. The most effective form of it is a continuous LED strip mounted under the wall cabinets, toward their front edge, with warm-to-neutral colour (about 2700–3000K, or up to 4000K if you like a crisper look), a colour rendering index of 90 or higher, and roughly 200 to 400 lumens per foot of counter.

That is the short version. The longer one explains why a ceiling full of recessed cans still leaves you chopping in your own shadow, how to choose between tape, pucks and light bars, where the driver goes, and which decisions have to be made when you order the cabinets, not after they are on the wall. We sell cabinets for a living, and under-cabinet lighting is the upgrade customers most often wish they had planned earlier. Once the uppers are hung, the counters are in and the backsplash is tiled, running a wire becomes a small demolition job.

Table of Contents

• Three Layers of Kitchen Light, and Why Task Comes First
• Where Task Light Belongs in a Kitchen
• Under-Cabinet Fixtures: Tape, Pucks and Light Bars
• Colour Temperature and CRI
• How Bright: Lumens, Foot-Candles and Spacing
• Front, Middle or Back: Placement and Glare
• Light Rail Molding: Hiding the Strip
• Power: Hardwired, Plug-In, Drivers and Dimmers
• Inside-Cabinet and Glass-Door Lighting
• Decisions to Make When You Order Cabinets
• Which Setup Should You Choose?
• Kitchen Task Lighting Mistakes We See
• Frequently Asked Questions

Three Layers of Kitchen Light, and Why Task Comes First

Lighting designers talk about three layers, and a kitchen needs all three to feel right:

• Ambient light fills the room so you can move around safely: recessed downlights, a flush ceiling fixture, daylight from windows.
• Task light is aimed at a work surface so you can see what you are cutting, reading or cleaning.
• Accent light is decorative: lit glass-front cabinets, a strip above the uppers washing the ceiling, a toe-kick glow at night.

Task light matters most because of geometry. Ceiling fixtures sit behind you when you stand at a perimeter counter. Your head and shoulders block their light, so the cutting board ends up in shadow exactly where you need to see.

The fix is to put a light source between you and the wall, above the work, which is precisely where the underside of a wall cabinet is. That is why, when people search "task lighting kitchen," nearly every answer they find turns into a guide to under-cabinet lights.

The National Kitchen and Bath Association's planning guidelines put it simply: beyond whatever general lighting code requires, every work surface should be well lit by appropriate task lighting. They do not specify a fixture. They specify the outcome, and the outcome is what we plan toward.

Where Task Light Belongs in a Kitchen

List every surface where you do something with your hands and give each one a light source that shines on it from above and in front of you.

A good test is to stand at each zone with the ceiling lights on and look at your hands. If you can see a shadow of your own head on the counter, that zone needs a task light. Our kitchen layouts guide shows how these zones arrange themselves in L-shapes, galleys and islands, and the kitchen island clearance guide covers the walkway spacing that decides where island downlights and pendants can hang.

Under-Cabinet Fixtures: Tape, Pucks and Light Bars

Almost all under-cabinet lighting sold today is LED. Older xenon and halogen pucks ran hot enough to warm the cabinet bottom and anything stored above it; LEDs run far cooler and use a fraction of the power. Within LED, there are three families.

LED tape in an aluminium channel. A flexible circuit strip with LEDs every inch or less, cut to length, stuck into a slim aluminium extrusion and covered with a frosted diffuser lens. The channel does three jobs: it draws heat away from the LEDs so they last, it keeps the strip straight, and with the diffuser it blends the individual dots into one smooth line.

This gives the most even light, fits any cabinet length, and is our default recommendation. Its drawback is that it needs a separate driver (power supply) and more thought about wiring.

Linear light bars. Rigid, factory-made fixtures in set lengths, often with the driver built in and a switch on the fixture. They are simpler to install, many are linkable end to end, and some plug straight into a receptacle.

Choose a length that fills most of each cabinet's width; a bar a few inches shorter than the cabinet it sits under leaves room for the cord and end caps. Gaps between bars show as dim spots on the backsplash, so fewer, longer bars are better than many short ones.

Puck lights. Small round fixtures, surface-mounted or recessed into the cabinet bottom. Each throws a cone of light, so along a counter they create scallops of bright and dim. That look suits accent work inside a glass cabinet or over a single display shelf far better than it suits prep counters.

If you buy tape, look at LED density and the diffuser. Denser tape and a deeper channel with an opal lens avoid "dotting," the reflection of each individual diode in a glossy countertop. Cheap clear lenses on shallow channels are the most common reason an expensive quartz counter shows a row of bright dots.

Colour Temperature and CRI

Two numbers on the box decide whether your food, your cabinets and your counters look right.

Colour temperature (CCT), in kelvins, describes how warm or cool white light looks. Lower numbers are warmer and more amber; higher numbers are cooler and bluer.

Our advice is to match the task light to the ceiling light. A 3000K ceiling over 4000K strips makes the counters look bluish and the room look patchy. If you are unsure, 3000K is the safe middle. Some tape and bars are "tunable" or have a selector switch for two or three CCTs, which is worth the modest extra cost if you are choosing before you have seen the finished room.

CRI (colour rendering index) measures how faithfully a light shows colours compared with a reference source, on a scale to 100. Cheap LEDs often sit in the low 80s, which flattens reds and makes wood tones and skin look dull.

For a kitchen, ask for CRI 90 or higher. You will see the difference in meat and produce, and just as much in cabinet colour: a warm white or a soft green painted door can shift noticeably under poor light. If a spec sheet lists R9, the saturated-red value, higher is better; a strip with CRI 90 and a strong R9 renders tomatoes and cherry cabinets much more truthfully.

Colour temperature also changes how cabinet finishes read. A mid-tone grey can look faintly brown under very warm light and cold under 4000K. That is one reason we suggest judging a door sample under the kind of light you plan to install; see our notes on matching cabinets, countertops and backsplash for how the whole palette interacts.

How Bright: Lumens, Foot-Candles and Spacing

Brightness is where the advice online varies most, because it depends on counter colour, cabinet height and taste. The figures most lighting suppliers cite for under-cabinet task light fall in a band of roughly 200 to 400 lumens per linear foot, with more for dark counters, which absorb light, and less if the strip is only there for evening ambience.

The other way to think about it is how much light lands on the counter, measured in foot-candles (lumens per square foot) or lux. Published summaries of Illuminating Engineering Society guidance for residential kitchen counters do not agree on one number, but most land around 50 foot-candles (roughly 500 lux), with some tables lower and some higher. You do not need a light meter; a phone app gives a rough reading, and the practical target is simply "no shadow, no squinting, no glare."

• Light counters (white quartz, pale laminate): the low end of the range is often plenty; bright strips over a white counter can feel harsh.
• Dark counters (black granite, soapstone, dark quartz): aim for the upper end, and prefer a matte or honed surface if you can, since polished dark stone reflects the strip back at you.
• Tall gaps: the standard gap between a 36-inch-high counter and the bottom of the uppers is about 18 inches. Taller gaps spread the light wider but dimmer, so step up the output.

Buy dimmable. It is far easier to have more light than you need and turn it down than to discover the strip is too weak once the backsplash is tiled. Dimming also gives you a night-light setting for free.

For wattage, modern LED tape commonly draws a few watts per foot. Add up the total length, multiply by the tape's rated watts per foot, and size the driver with headroom; lighting suppliers generally recommend loading a driver to no more than about 80% of its rating, so it runs cooler and lasts longer. Check the driver's minimum load too: some dimmable drivers flicker on a very short run.

Front, Middle or Back: Placement and Glare

Where the strip sits across the depth of a 12-inch-deep wall cabinet changes everything about how the counter looks.

• Front, just behind the face frame or light rail, LEDs pointing straight down. This lights the whole depth of the counter, including the front edge where you work, and washes the backsplash evenly from above. It is the placement most cabinet makers and lighting suppliers recommend for task light, and ours as well; lighting guides commonly put the strip within 1 to 3 inches of the cabinet's front edge.
• Middle. A reasonable compromise if a front-mounted channel would be visible; light reaches most of the counter.
• Back, against the wall. This produces a hot band of light on the backsplash, leaves the front of the counter dim and shows every bump in the tile. It looks dramatic in photos and is the weakest option for actually working.

There is one exception worth knowing. With highly polished counters, a front-mounted strip can reflect in the surface as you look across it. KraftMaid's lighting guide suggests that for shiny tops, fixing the light to the inside back of the face frame with the LEDs facing the backsplash reduces that glare.

An opal diffuser and an angled channel, which tilts the light 30 or 45 degrees back toward the wall, do much the same job. Try it at night with the fixture taped in place before anything is screwed in.

Glare from the fixture itself is a separate problem: it is about seeing the strip from where you sit. From a dining table or sofa, your eye is lower than the bottom of the uppers, and a bare strip is directly in view. That is what light rail fixes.

Light Rail Molding: Hiding the Strip

Light rail molding is a slim trim piece fastened along the bottom front edge of wall cabinets. It projects down an inch or two below the cabinet bottom, which creates a lip that hides the fixture and cuts glare for anyone seated or standing back from the counter. It also finishes the underside visually, the way crown molding finishes the top. Light rail is sold as a cabinet accessory in the same finish as the doors, and we stock light rail molding alongside the cabinet lines we carry.

Three points to plan:

1. The rail's height must exceed the fixture's. Measure the channel or light bar you plan to use. A rail that is shallower than the fixture only half hides it.
2. Put the strip right behind the rail. That gives you front placement and hidden hardware at once.
3. Check the profile against the door style. Flat, square rail suits slab and shaker doors; profiled rail suits traditional raised-panel kitchens. On many framed wall cabinets the face frame drops a little below the cabinet floor and already hides part of a slim channel; frameless boxes are usually flush underneath, so the rail has to provide the whole lip.

Over a window, a valance bridging two wall cabinets does the same job and can hide a short strip for the sink. Our guide to kitchen cabinet molding types covers light rail beside crown, scribe and toe-kick trim, and the glossary entries for light rail molding and valance have short definitions. If you are fitting wall cabinets that stop short of a straight wall, scribe molding is the trim that closes those gaps.

Power: Hardwired, Plug-In, Drivers and Dimmers

Under-cabinet systems come in two electrical flavours, and the choice decides how clean the result looks.

Plug-in. The fixture, or its driver, plugs into a receptacle, usually one of the backsplash outlets. It needs no electrician and suits renters and retrofits. The costs are a visible cord somewhere, a receptacle that is now occupied, and switching from the fixture or a remote rather than a wall switch.

Hardwired. A line-voltage circuit is run to a junction box, and from there either to fixtures with built-in drivers or to a separate driver that feeds low-voltage wire to the strips. The lights are controlled from a wall switch or dimmer like any other kitchen light.

There are no cords and no used-up outlets, and it is the finished-looking option for a remodel. Any work on household wiring should be done by a licensed electrician, and your local electrical code and permit rules apply; we deliberately do not get into code specifics here because they vary by jurisdiction and are the electrician's responsibility.

Drivers. LED tape runs on low-voltage DC, commonly 12 or 24 volts, and the driver converts household power to it. A few practical rules:

• Prefer 24V tape for long runs. Voltage drop along a long 12V strip makes the far end visibly dimmer; 24V carries further before that happens.
• Size with headroom. As above, suppliers generally recommend keeping the load at or below about 80% of the driver's rating.
• Put the driver somewhere you can reach and that can breathe. Common spots are on top of a wall cabinet behind the crown, inside an adjacent cabinet, or in a basement below. Drivers make some heat and are the part most likely to fail first, so do not bury one behind drywall or seal it in a space with no air.
• Match the driver to the dimmer. A "dimmable" strip is only dimmable if the driver is, and the wall dimmer must match the driver's dimming type: forward-phase (triac or incandescent-style), reverse-phase (ELV), MLV, or 0–10V. Mismatches cause flicker, buzzing and a narrow dimming range. Buy the driver and dimmer as a pair that the driver's maker lists as compatible.

Switch location. Put the under-cabinet switch where you enter the kitchen and near the main work zone, separately from the ceiling lights, so you can run task light alone at night. For long L- or U-shaped runs, a three-way switch or a smart dimmer with a remote keypad saves walking. Smart dimmers and app-controlled drivers also allow a low "night" scene.

Inside-Cabinet and Glass-Door Lighting

Lights inside cabinets are mostly accent lighting, but some do real work.

• Glass-front wall cabinets. Pucks or a short vertical strip on each side of the face frame make glassware and dishes glow and turn the cabinet into a lantern in the evening. Glass shelves let light fall through all levels; wood shelves need a light on each shelf. Glass-door wall cabinets and doors prepped for glass are among the cabinet types we sell. Our glass cabinet doors buying guide covers glass types and where they work.
• Tall pantries and deep drawers. A door- or drawer-activated switch turns on a short strip when opened. Battery units are fine here because they run only for seconds at a time.
• Open shelves. A strip in a routed groove or a thin channel under each shelf lights the shelf below, which doubles as task light for a coffee or bar station.
• Toe kick and above-cabinet strips. Pure accent: a glow at the floor for night navigation, or light bounced off the ceiling to make the room feel taller.

Built-in lighting is common in closet systems as well. St. Martin's wardrobe program, for example, lists integrated LED strips among its standard features; see the St. Martin wardrobes page.

Decisions to Make When You Order Cabinets

This is the section most lighting guides skip, because they are written by lighting companies. The best task lighting is planned into the cabinet order and the rough-in, before any drywall closes. Here is the order we would handle it in:

1. Decide on fixtures and placement first. Pick the channel or bar and whether it sits at the front. Its height tells you how tall the light rail needs to be.
2. Add light rail to the cabinet order. It ships in the cabinet finish, so ordering it later risks a colour mismatch between batches. Count linear feet for every wall run and add a little for cuts.
3. Choose the valance over the sink window. If you want light over the sink and there are uppers either side, a valance can hide it.
4. Plan glass doors and their lighting together. If you want lit glass cabinets, decide now so the electrician can bring a feed to the cabinet top and the installer can drill a discreet wire hole.
5. Mark the driver location. A cabinet top behind crown molding, or a sink-base or corner cabinet with an accessible panel, works well. Tell your installer so no one screws a filler over it.
6. Rough in before drywall. The electrician brings the feeds to the right points in the wall, just below each wall-cabinet run, while the wall is open. This is the step that saves the most money compared with retrofitting.
7. Confirm the backsplash plan. Stone or tile backsplashes need the wire exits positioned so they are hidden under the cabinet, not in the middle of the tile.
8. Keep outlet positions and lighting separate. Receptacles along the backsplash are governed by electrical code; do not assume a light can be fed from any convenient outlet without the electrician agreeing.

Our free 3D design includes wall cabinet heights and trim, and we will add light rail and valances to the itemized quote so they arrive with the cabinets. Standard wall cabinet heights and the gap between counter and uppers are covered in our wall and tall cabinet sizes guide and in important kitchen dimensions before buying cabinets. If you are designing for a wheelchair user or a seated cook, lower wall cabinets change the geometry of the light; see our sibling guide to ADA kitchen cabinet heights and clearances.

Which Setup Should You Choose?

Most kitchens fit one of a few situations. Start from yours, then adjust colour and brightness to the counter and cabinet finish.

Whichever row you are in, the buying checklist is the same. Before you order, confirm that you have:

1. measured the length of every wall-cabinet run and the depth of its light rail;
2. picked one colour temperature for the whole room;
3. checked CRI 90+ on the spec sheet, and R9 if it is listed;
4. sized the driver at no more than about 80% load;
5. bought a dimmer the driver's maker lists as compatible;
6. marked where the driver lives and where each wire leaves the wall.

Six ticks, and the lights will work the first night. Getting kitchen task lighting right is mostly about doing those six things at the cabinet-order stage rather than after the tile is up. If the room needs trim to hide it, our valance page shows the window piece, and the glossary entry on under-cabinet lighting has a short definition to share with your electrician.

Kitchen Task Lighting Mistakes We See

• Leaving it until after install. Retrofitting a hardwired system means fishing wire behind finished walls or accepting visible cords.
• Mounting the strip against the wall. It lights the tile, not the cutting board.
• Skipping light rail. Visible LEDs from the dining table are the most common complaint we hear after a kitchen is finished.
• Short bars with gaps. Each gap shows as a dim patch on the backsplash.
• Mismatched colour temperature between ceiling and counter lights, or between two brands of strip on the same wall.
• Low-CRI bargain tape that makes painted cabinets look dingy and food look grey.
• Clear lenses over polished counters, which mirror every diode.
• Non-dimmable driver on a dimmer, or a dimmer the driver does not support, causing flicker.
• Driver buried where it cannot be reached, turning a cheap replacement into a carpentry job.
• Forgetting the sink and island. The perimeter gets strips and the two busiest zones are left to ceiling cans.

Most of these cost nothing to avoid if they are caught at the design stage. We're builders who sell cabinets, and we would rather ask about lighting on the first call than hear about it after the backsplash is set.

Frequently Asked Questions

What is task lighting in a kitchen?

It is light aimed at a specific work surface, such as the counters, the sink, the cooktop or the island, as opposed to ambient light that fills the room. Under-cabinet LED strips, the lights built into a range hood, and pendants or downlights over an island are the usual sources. The goal is a bright, shadow-free surface where your hands are.

Where should under-cabinet lights be placed, front or back?

Toward the front of the cabinet bottom, pointing down, for the most useful light on the counter; many guides say within 1 to 3 inches of the front edge. Mounting at the back lights the backsplash and leaves the front of the counter dim. With very glossy counters, an angled channel or a back-of-frame mount aimed at the backsplash reduces reflections.

What colour temperature is best for under-cabinet lights?

Most kitchens look best at 2700–3000K, and 3000K is the most common choice because it flatters both wood and painted whites. 3500–4000K suits cool, modern grey, white and black palettes. Whatever you pick, match the ceiling lights so the room reads as one colour, and avoid 5000K and above, which tends to look clinical at home.

How many lumens do I need for under-cabinet lighting?

Commonly cited figures are about 200–400 lumens per linear foot of counter. Go toward the upper end for dark or polished counters, which absorb or reflect light, and toward the lower end over white quartz. Because every kitchen is different, buy a dimmable system and set the final level by eye at night, when the task light is working alone.

Is LED tape or puck lighting better under cabinets?

For work surfaces, LED tape in a channel with a diffuser, or a linear light bar, is better: it lays one even line of light across the counter. Pucks throw separate cones, which leaves bright and dim scallops along the backsplash. They are still the right choice inside glass cabinets and over single display shelves, where pools of light look intentional.

Should under-cabinet lights be hardwired or plug-in?

Hardwired looks cleaner, runs from a wall switch or dimmer and frees your backsplash outlets, so it is the right choice in a remodel; a licensed electrician should install it under local code. Plug-in fixtures are fine for renters and for retrofits where opening walls is not an option, at the cost of a visible cord and an occupied receptacle.

Do I need light rail molding with under-cabinet lights?

You do not have to have it, but it hides the fixture and stops glare for anyone seated at a table or island. Make sure the rail is deeper than the channel or bar it covers. If you are ordering new cabinets and plan lighting, add light rail to the same order so it arrives in the same finish and batch.

What CRI should kitchen lights have?

90 or higher. Below that, reds and wood tones look flat and painted colours drift, which affects both food and cabinet finishes; cheap strips often sit in the low 80s. If the spec sheet lists R9, the saturated-red score, a higher number is better. It is worth judging a door sample under the strip you plan to buy.

Where do I put the LED driver?

Somewhere accessible and ventilated: on top of a wall cabinet behind the crown molding, inside an adjacent cabinet, or in a basement below. Drivers give off some heat and are usually the first part to fail, so never seal one inside a wall or behind a screwed-on filler. Tell your installer where it goes so the spot stays reachable.

Can under-cabinet lights be dimmed?

Yes, if both the driver and the wall dimmer support dimming and use the same method: forward-phase, reverse-phase (ELV), MLV or 0–10V. A mismatch causes flicker, buzzing or a narrow range. Check the driver maker's compatibility list before buying the dimmer, and remember that plug-in bars usually dim only from their own switch or remote.

Plan the Lighting With Your Cabinets

Tell us about your lighting plans when you send your layout and we will include light rail, valances and any glass-door cabinets on the same itemized quote, so the trim arrives in the right finish with everything else. Our design service produces a free 3D design and an itemized quote, and contractors can get trade pricing through Captivating Pro.

Reach us through the contact page or call 609-900-3358. If you are still choosing the rest of the kitchen, our sibling guides to sink base cabinet sizes and formica and laminate surfaces cover two decisions that sit right under the lights.

Sources: NKBA Kitchen Planning Guidelines (task lighting at every work surface); KraftMaid under-cabinet lighting guidance (glossy-counter mounting); published summaries of Illuminating Engineering Society residential recommendations; LED tape and driver manufacturers' installation notes (voltage drop, 80% load, dimmer compatibility).