How to install LED strip lights

Plan the path

Measure every straight run, inside corner, and return. Note where the power supply will sit and how the lead wires will reach it. Add a small allowance at each end so connections are not forced tight against a corner.

Sketch the layout before you cut anything. A few minutes on paper prevents short segments that cannot be joined cleanly later.

Match voltage and power

LED tape is almost always 12V or 24V DC. The strip, controller, and power supply must share the same voltage. Multiply length by the strip’s watts-per-metre (or watts-per-foot), then choose a supply rated about 20–30% above that total. Running a driver at its limit shortens its life and can cause flicker.

Longer 12V runs dim toward the far end. For extended paths, use 24V tape or feed power from more than one point.

Test before you cut

Connect the uncut reel to power and confirm every diode lights, colours are even, and the controller behaves as expected. Faults are easier to return or isolate before the tape is shortened and adhered.

Cut only at the marks

Every cuttable strip has a printed interval — a scissor icon or a pair of copper pads — typically every 25–100 mm depending on density. Cut squarely through that mark with sharp scissors. Cutting between marks opens the circuit and that segment will not light.

Dry-fit the pieces against the surface first. Once cut, sections cannot be restored; they can only be joined with a connector or solder.

Make the connections

For most first installations, solderless clip connectors are sufficient: open the latch, seat the copper pads fully under the contacts, and close firmly. Match pin count to the strip (2-pin single colour, 4-pin RGB, and so on). Confirm + meets + before applying power.

Soldered joints are more durable for permanent work. If the strip is silicone-jacketed, remove a short length of jacket so the pads are bare.

Prepare the surface, then mount

Adhesive fails on dust, grease, silicone residue, and heavy texture. Wipe the path with isopropyl alcohol and let it dry. Peel the backing a short length at a time and press firmly along the tape — do not stretch it around corners; cut and join instead.

Aluminum channels improve the line, hide the dots behind a diffuser, and help dissipate heat. Mount the channel first, seat the tape inside, then snap on the cover.

Power up and read the line

Energize the finished run and look along its length. You are checking for even brightness, correct colour, secure connectors, and any lift in the adhesive. If the far end is visibly dimmer than the start, the run is too long for a single feed — add a second power injection point or shorten the circuit.