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Under-cabinet lighting should deliver 200 to 300 lumens per linear foot of counter — so a 10-foot cabinet run wants 2,000 to 3,000 lumens in total, on a dimmer. That output puts roughly 70 to 80 foot-candles on the work surface, inside the 50 to 100 foot-candle range the Illuminating Engineering Society recommends for food preparation. Specify 2700K to 3000K to match typical kitchen lighting and CRI 90 or higher so food reads its true color. Mount toward the front edge of the cabinet, not the back.
How many lumens for my counter length?
| Counter run | Lumens at 200/ft | Lumens at 300/ft | Typical fixture plan |
|---|---|---|---|
| 3 ft | 600 | 900 | One 24 in. bar |
| 6 ft | 1,200 | 1,800 | Two 30–36 in. bars |
| 10 ft | 2,000 | 3,000 | Three bars or a continuous strip |
| 16 ft (two walls) | 3,200 | 4,800 | Continuous strip on a single driver |
| Island overhang, 6 ft | 1,200 | 1,800 | Pendants above instead |
These numbers sit on top of the ceiling layer rather than replacing it. Total kitchen output is worked through in how many lumens for a kitchen, where the under-cabinet layer typically accounts for around 30 percent of the total. Fixture counts and spacing are covered in how many under-cabinet lights you need.
Why does placement matter more than brightness?
Because the loudest complaint about under-cabinet lighting is never that it is too dim — it is glare. Mount a bright strip at the back of the cabinet and it washes the backsplash, and if that backsplash is polished tile, glass or stainless, it reflects straight into your eyes at standing height. Mount the same strip in the front third of the cabinet bottom and the light falls on the counter where the work happens, with the emitter hidden behind the cabinet face. If the cabinets have no light rail or lip, add a small trim strip or choose fixtures with a frosted diffuser. On very glossy countertops, a diffused lens matters more than any adjustment to output.
Which format delivers the light best?
Continuous LED tape gives the most even wash and disappears completely behind a light rail, at the cost of planning a driver, a run length and a dimming method. Linkable light bars are the practical retrofit choice — they connect end to end, come in lengths matched to cabinet widths, and produce good evenness at 250 to 400 lumens per foot. Puck lights are the weakest option for task lighting because they cast distinct pools with dark gaps between, and the scalloped shadows on the backsplash are a giveaway; they are better used as accent light inside glass-front cabinets. Our best under-cabinet lighting picks compare the three formats on evenness, install difficulty and owner-reported reliability.
Should it be dimmable?
Yes, and it changes how much the kitchen gets used. Under-cabinet lighting at full output is a working light; the same fixtures at 15 to 20 percent are the most pleasant night light in the house and are frequently the only thing on in a kitchen after dinner. Dimming LED task lighting has its own requirements — line-voltage bars generally need an LED-rated wall dimmer, while low-voltage tape dims at the driver or through an inline controller. Both cases are covered in whether LED lights need a special dimmer and can you dim LED strip lights.
What should you plan before installing?
Decide where the power comes from before you buy — a plug-in transformer into an existing outlet is simplest, while a hardwired install to a wall switch is neater and more permanent but is electrical work governed by local code. Measure the usable cabinet width, not the nominal one, since the fixture has to fit between the cabinet sides and clear any hardware. And check the depth of the cabinet lip so the fixture stays hidden. The step sequence is in how to install under-cabinet lighting; if the plan involves new circuits or opening walls, bring in a licensed electrician and check permit requirements in your jurisdiction.
We do not buy, test or physically handle any product on this site — figures here come from Illuminating Engineering Society recommended practice and manufacturer specifications, with rankings based on aggregated owner reviews. See how we rank.
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