Under-cabinet strip lighting notes
Under-cabinet strip lighting is a linear task layer. It sits under the cabinets, follows the cabinet run and usually works with a separate bench or room layer.
Under-cabinet strip sequence
Measure the cabinet line, then read strip output, connected load and driver capacity as one local note.
- 1Measure the run
Enter the cabinet line length that the strip will actually light.
- 2Select the strip
Keep lm/m and W/m from the exact strip schedule line.
- 3Add headroom
Use the driver headroom as a capacity margin, not a design shortcut.
- 4Keep the bench visible
Read the strip note beside the bench task result and room lighting result.
Application planning matrix
Match the search phrase to one surface, one lighting group and one later check before the result is carried into layout work.
| Search phrasing | Calculator case | Carry forward |
|---|---|---|
| Single wall run | One continuous strip under one cabinet line. | Cabinet length, profile depth, finish and later bench reading. |
| Corner kitchen strip | Two joined runs that may need a note at the corner. | Corner splice, cable path and shadow at the joint. |
| Pantry or prep strip | Task strip on a narrower, utility-style cabinet run. | Shelf depth, control zone and drawer or door clearance. |
| Cabinet strip versus room lighting | Local strip layer beside the ambient ceiling light. | Bench task level and whole-room take-off. |
Result reading
Each output supports a different part of the local lighting note.
| Output | Technical meaning | Later check |
|---|---|---|
| Total strip length | All metres included in the run. | Check that the total matches the cabinet line. |
| Total strip lumens | Length multiplied by strip output per metre. | Compare with the bench task requirement. |
| Connected load | Length multiplied by watts per metre. | Carry to load density or energy only if needed. |
| Minimum driver rating | Connected load plus the entered headroom. | Choose a driver above this number. |
Input discipline
Small residential lighting cases become clearer when these assumptions are written beside the number.
| Input | Why it changes the result | Check before layout |
|---|---|---|
| Cabinet length | The strip only helps if the run length is right. | Measure the actual lit run under the cabinets. |
| Profile location | Forward or rear placement changes shadow and glare. | Note the mounting position and diffuser type. |
| Control group | The strip may need a different switch or scene from the room. | Write the operating state beside the load note. |
| Heat path | Closed profiles and deep recesses affect long-run performance. | Keep thermal notes outside the load arithmetic. |
cabinet underside before the number
A useful under-cabinet strip lighting result begins with the exact cabinet underside, not the room name. The same room can contain circulation, task, shelf and accent positions that need different light. Naming the surface keeps the entered area, target lux and fitting group tied to one visible job.
That boundary also keeps the arithmetic honest when the room changes. If the cabinet run moves, or if another row joins the group, the area and count can be adjusted without blending unrelated lighting roles into one average.
Separate local light from the whole room
under-cabinet strip lighting often sits inside a larger room-lighting plan. A kitchen, bedroom, hallway or shed can already have ambient light, yet the local surface may still need its own strip run note. Treat the local group as a layer that works with the room, not as a substitute for the room average.
The companion room-lighting and lux-to-lumens pages remain useful when the whole space needs a broad allowance. This page keeps attention on the smaller surface, line or face where placement, shadows and sightlines decide whether the light feels useful.
Fitting output and placement both matter
Published lumens or strip output describe the light leaving the fitting. They do not say where the light lands. A pendant, downlight, strip or bracket can have enough output and still miss the edge of the cabinet underside if spacing, aiming or mounting height is weak.
Read the count, spacing and beam numbers together. A smaller number of high-output fittings can look patchy, while a closer group with lower output may give a calmer result. The layout note should identify the selected fitting type and the intended role.
UF, MF and local margins
Utilisation and maintenance factors keep assumptions visible. Dark finishes, deep shelves, enclosed cabinets, dusty sheds and awkward mounting positions reduce confidence in a bright-looking lumen figure. A conservative factor may be more honest than a tidy count based on perfect surfaces.
Margin is not only extra brightness. It can support dimming, later fitting changes or a slightly darker finish, but it can also create glare or harsh contrast. Keep the factor choice beside the result so a later reviewer can see why the count landed where it did.
Spacing controls shadows and bright patches
The cabinet run deserves a simple spacing check before positions are marked. End offsets, centre spacing and beam footprint show whether the surface receives a continuous band of useful light or a series of bright spots and weak gaps.
Furniture, cabinet doors, shelves, splashbacks, vehicles, tools and people can all cast shadows. When a body normally stands between the fitting and the work surface, the lighting group may need a different side, a closer row or a second local layer.
Controls shape the real case
Separate cabinet or pantry switching should be written beside the calculation when it changes normal operation. A group that is dimmed for evening use, switched with a pantry door or separated from ambient downlights behaves differently from a group that always runs at full output.
Controls also change how overshoot is judged. Extra installed lumens can be manageable with a stable dimmed scene, while the same output on a single switch may feel harsh. The calculation gives the capacity note; the control state explains normal use.
Measured checks close the loop
After installation or mock-up, a same-plane bench lux reading is the cleanest way to test the estimate. Measure on the same surface named in the calculation, under the same control state, and note the meter position so a later reading can be compared fairly.
Measured lux will not explain every visual issue. Reflected glare, hard shadows, poor colour rendering and uneven vertical faces may need observation as well. Still, a numbered reading helps separate a brightness problem from a placement or comfort problem.
Australian residential limits
under-cabinet strip lighting pages on AuLumens are planning calculators for light quantity, beam geometry, strip load or local illuminance. They do not choose electrical wiring, certify wet-area equipment, assess emergency lighting, rate public roads or replace project-specific lighting review.
It is output and load sizing only. Keep outdoor exposure, bathroom zones, concealed drivers and any hard-wired electrical work in the appropriate project file. The lighting result is still useful because it records the visible target, fitting group and assumptions before those separate checks begin.
A concise calculation note
A readable note includes the cabinet underside, dimensions or length, target plane, target lux where entered, fitting output, input watts, spacing or count, factors and connected load. For strip lighting, include total metres, W/m, lm/m, voltage and driver headroom.
Keep the kitchen-bench task calculator nearby when the strip is only one layer of the bench light. That context makes the result practical. Another person can revise the selected fitting, change the area, adjust the spacing or compare a measured reading without guessing how the original number was produced.