Colin FosterBy Colin Foster

Updated November 2026

Lighting underneath kitchen cabinets is one of the most effective upgrades you can make to a working kitchen, because it puts light exactly where you chop, mix and read recipes. In this guide you will learn how to measure your counters, choose a fixture type, space the lights for even coverage, plan the wiring and avoid the glare and shadow problems that make many installs disappointing. The steps below follow the same order a designer uses on a real project.

Why Under-Cabinet Light Works Better Than Overhead Alone

Ceiling fixtures usually sit between you and your countertop, so your own body casts a shadow across the work surface. Light mounted under the upper cabinets sits in front of that shadow line and washes the counter directly. This is why most kitchen lighting plans treat under-cabinet fixtures as task lighting rather than general room light. For a broader view of how the layers fit together, see Kitchen Lighting Plan: Task, Ambient and Accent Layers.

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Step 1: Measure the Run and Mark the Work Zones

Start by measuring each run of upper cabinets from end to end, including any gaps for a range hood or a window. Note the height from the countertop to the underside of the cabinet, which typically falls between 18 and 21 inches in most kitchens. Then mark the work zones: the prep area near the sink, the cooking zone at the range and any baking or coffee station. Those zones are where you want the most light.

Measurements to Record

  • Total linear length of each cabinet run, measured in inches
  • Distance from countertop to underside of cabinet
  • Depth of the upper cabinets, usually 12 inches, which affects how far light reaches forward
  • Location of the range hood, sink, outlets and switch
  • Any obstructions such as cabinet stiles, crown molding or open shelving

Step 2: Choose the Right Fixture Type

Under-cabinet fixtures come in several forms, and the right one depends on how much access you have and how you want the light to look. LED strip tape gives a continuous line of light and hides easily behind a valance. Puck and disc lights give pools of light at set intervals and suit a more traditional look. Linear bars give brighter, more even output for a long run. If you want a side-by-side comparison of the common options, Best Under-Cabinet Lighting for Kitchens: 6 Fixtures Compared walks through the differences in detail.

Fixture Types at a Glance

Fixture type Light pattern Best for Install effort
LED strip tape Continuous line Long runs, hidden valances Low to moderate, needs a channel or diffuser
Puck or disc lights Spot pools Short runs, traditional cabinets Moderate, drilling or adhesive mounts
Linear LED bars Even, bright band Full-width runs, task-heavy kitchens Moderate, screw-mounted
Plug-in puck sets Spot pools Renters, no hard wiring Very low, but visible cords

Step 3: Set the Spacing for Even Coverage

Spacing determines whether the counter looks evenly lit or striped with bright and dark patches. For spot fixtures, a common starting point is one light every 12 to 16 inches along the run, placed toward the front edge of the cabinet so the light falls forward onto the counter rather than back onto the wall. For continuous strip, plan to run it the full length of the cabinet, leaving a small gap at each end for the connectors. Manufacturers usually publish a maximum run length per power supply, so check that spec before you cut anything.

Placement Rules

  1. Mount fixtures about 2 inches in from the front edge of the cabinet bottom.
  2. Keep spot fixtures centered within each cabinet door or drawer width when possible.
  3. Avoid placing a fixture directly over a sink or range where the hood or faucet can block it.
  4. Leave at least 3 inches of clearance from the wall on each side for heat dissipation and a clean look.

Step 4: Plan the Power and Switching

Most under-cabinet systems run on low-voltage DC, which means a driver or power supply converts standard 120-volt household power to 12 volts or 24 volts. Place the driver in an accessible spot, such as inside a cabinet or in a junction, and keep it ventilated. You can wire the system to a single wall switch, a dimmer or a smart control. A useful approach is to put the lights on their own circuit or switch so you can run them without the overhead fixtures. If you are unsure about wiring, consult a licensed electrician, especially when working inside walls or near a range.

Power Planning Checklist

  • Confirm the fixture voltage (12V or 24V) before buying a driver
  • Add up the total wattage and keep the driver at or below its rated load, usually with some headroom
  • Identify the nearest outlet or junction box for the driver
  • Decide whether you want a wall switch, a dimmer or a smart controller
  • Plan cable routing through the cabinet back or along the underside, avoiding sharp bends

Step 5: Install the Fixtures Step by Step

Once the plan is set, the install itself is methodical. Turn off power at the breaker before you touch any wiring, and test the circuit with a voltage tester. Mount your channels or brackets first, then position each fixture, then connect the low-voltage runs. Test everything before you close the cabinets or add trim. Fixing a dead section at this stage is far easier than tearing out a finished backsplash later.

Installation Sequence

  1. Mark the fixture positions on the underside of the cabinet using your spacing plan.
  2. Drill pilot holes for screws, or prepare adhesive mounts on a clean, dry surface.
  3. Mount the channels, brackets or fixtures and secure all wiring with clips.
  4. Connect the low-voltage cable to the driver and confirm polarity.
  5. Power on and check every fixture before finishing the trim.
  6. Route and secure any exposed cable, then install the diffuser or valance.

Step 6: Control Glare and Color Temperature

Glare is the most common complaint with under-cabinet lighting. If you can see the bare LED from your normal eye level, the fixture needs a diffuser or a different mounting position. Choose a warm-white to neutral-white color temperature, typically in the 3000K to 4000K range, for a kitchen where food and surfaces need to look natural. Higher numbers look cooler and can make wood cabinets feel harsh. Dimmable drivers let you adjust brightness for evening use.

Glare and Color Checks

  • Stand at the sink and at the range and look up at the fixtures. If you see bare LEDs, add a lens or move the light forward.
  • Compare two color temperatures side by side on a sample counter if you can.
  • Match the color temperature of your under-cabinet lights to your overhead lights so the room does not look split.

Common Mistakes to Avoid

Many under-cabinet installs look fine on day one and then disappoint. These are the errors that come up most often.

  • Placing fixtures too far back. Light mounted near the wall leaves the front edge of the counter in shadow.
  • Undersizing the driver. A driver running at its limit can flicker, overheat and fail early.
  • Skipping the diffuser. Bare LEDs create hot spots and visible points of glare.
  • Ignoring cabinet height. Mounting fixtures on a very tall upper cabinet can push light too high to reach the counter well.
  • Running cable through the open front of the cabinet. Keep cords hidden and clipped, which also protects them from heat and pull-out drawers.
  • Forgetting the layout as a whole. Under-cabinet light works best alongside good general light. Kitchen Ambient Lighting: General Light Done Right covers how the two should be balanced.

Tips for a Cleaner Finished Look

Consider running the wiring through the cabinet back or using a continuous channel that matches the cabinet finish. If you are planning new cabinets, ask the installer to pre-drill for the cable and mount a junction box in advance. For kitchens with mixed materials, the choice of cabinet finish can change how the light reads on the surfaces. Kitchen Cabinet Finishes: Paint, Stain and Indoor Air explains how sheen and color affect reflected light. If your counters are a light stone, the reflected glow will be stronger, which can improve the effect of your fixtures.

  • Aluminum LED channel with frosted diffuser: A channel hides the LED strip, spreads the light evenly and helps dissipate heat. View on Amazon
  • Dimmable LED driver with ample headroom: A driver rated above your total load runs cooler and lasts longer. View on Amazon
  • Non-contact voltage tester: A quick way to confirm a circuit is dead before you work near the wiring. View on Amazon
  • Cable clips for under-cabinet wiring: Small clips keep low-voltage cable tidy and out of the way of drawers. View on Amazon

FAQ

How far apart should under-cabinet lights be spaced?

For spot fixtures, a common starting point is about 12 to 16 inches between centers. Continuous LED strip should run the full length of the cabinet, with connectors placed where they stay hidden.

Should under-cabinet lights be warm or cool white?

Most kitchens look best in the 3000K to 4000K range. Warm white feels cozier, while neutral white shows true colors on food and counters more accurately. Match the overhead lights for a unified look.

Can I install under-cabinet lighting myself?

Plug-in and battery options require little skill, and many low-voltage LED kits are designed for DIY installation. Hardwired systems involving a new circuit or work inside walls should be handled by a licensed electrician.

Do I need a dimmer?

A dimmer is not required, but it lets you reduce brightness for evening use and makes the lights feel more comfortable. Confirm that the driver and dimmer are compatible before buying.

Why are my LED lights flickering?

Flicker usually points to a driver that is overloaded, a dimmer that is incompatible with the LED load, or a loose connection. Check the total wattage against the driver rating first.

How do I hide the wires?

Route cable along the back edge of the cabinet bottom, use adhesive clips, and keep the driver inside a cabinet. A channel or valance can cover the strip completely.

Is under-cabinet lighting worth adding to an existing kitchen?

Yes, for most kitchens. It improves task visibility at the counter, especially where overhead fixtures cast shadows. Plug-in or battery options make the upgrade possible even without opening the walls.

Conclusion

Good lighting underneath kitchen cabinets comes down to careful measuring, the right fixture type and disciplined spacing. Place the lights toward the front edge, control glare with a diffuser and match the color temperature to the rest of the room. Test the system before you close everything up, and bring in an electrician for any hardwired work.

Ready to choose one?

Colin Foster

About Colin Foster

Colin Foster is part of our editorial team and reviews and edits our kitchen design & remodeling guides, checking product details against manufacturer specifications and owner feedback.