How to Cut LED Strip Lights Safely (Step-by-Step Guide)

Standard LED strip lights are typically sold in 16.4 ft (5 m) or 32.8 ft (10 m) reels. These flexible lighting strips can bend around corners, but only within a certain bending radius — usually about 2 inches (5 cm).

Because of this limitation, installing LED strips in small niches, cabinets, or decorative architectural elements can sometimes require shorter sections than the original reel length. That’s why most manufacturers design LED strip lights so they can be cut and reconnected safely.

In this guide, we’ll explain how to cut LED strip lights correctly so you avoid short circuits and prevent damage to the lighting system.

If you’re looking for high-quality lighting products, you can explore our collection of LED strip lights in our catalog.

Understanding How LED Strip Lights Work

LED strip lights consist of a flexible printed circuit board (PCB) with conductive copper traces. On this board you will find:

LED chips
current-limiting resistors
contact pads for power connections

LEDs are arranged in small groups (modules). The design depends on the voltage and brightness of the strip.

The number of conductive tracks also varies depending on the type of strip:

2 contacts – single color LED strips
4 contacts – RGB LED strips
5 contacts – RGBW LED strips

However, for interior lighting projects, designers often need shorter LED sections, which raises the common question:

Can LED strip lights be cut?

The answer is yes — but only at specific points.

Where You Can Cut LED Strip Lights

Manufacturers mark safe cutting points directly on the strip. You will typically see: ✂ a scissor icon or — — — a dashed cutting line. These marks indicate where it is safe to cut. But why must you cut LED strips only at these points?

LED chips inside the strip are connected in groups:

LEDs inside a group are connected in parallel
groups themselves are connected in series

If you cut the strip outside the marked area, you may damage the circuit and create a short circuit, which can cause the entire strip to fail. Always follow the manufacturer’s cutting marks.

Cutting Waterproof LED Strips

If your LED strip has a waterproof coating, the cutting process may require extra care depending on the protection type.

Silicone coating

Some LED strips are covered with a thin silicone layer. Cutting them works the same way as regular strips, but after cutting you should:

reseal the exposed edge
restore waterproof protection

This prevents moisture from entering the circuit.

LED strips inside silicone tubing

For strips protected by silicone tubes, follow this process:

Carefully cut the outer silicone tube with a utility knife.
Avoid using scissors for the tube — they may stretch or damage the material.
Once the strip is exposed, cut the LED strip itself using scissors at the marked point.

Thick waterproof coating

Some outdoor strips have thicker waterproof insulation. In this case, cut in stages:

top insulation layer
LED strip PCB
bottom insulation layer

After cutting, trim the strip slightly if needed to prepare the contact pads for soldering or connectors.

What If the Strip Has No Cutting Marks?

In rare cases, LED strips may not have visible cutting marks. If that happens, you can cut the strip:

at the edge or center of the contact pad
along the wider copper section of the power trace

This area typically marks the boundary between LED modules. Before cutting, check both sides of the strip. Some manufacturers place the markings on the back side.

How to Connect LED Strip Sections

After cutting the strip to the required length, the sections need to be connected properly. Keep these limits in mind:

12V LED strips: up to 16.4 ft (5 m) from one power source
24V LED strips: up to 32.8 ft (10 m)

⚠ Never connect 12V and 24V LED strips together, as this can damage the entire lighting system.

There are two common ways to reconnect LED strip sections:

1. Soldering

Soldering provides the most reliable electrical connection, but it requires some care.

Basic guidelines:

Use a low-power soldering iron with a fine tip
Avoid overheating the copper pads
Do not use aggressive acid flux
Test the strip after each connection

2. LED Strip Connectors

Connectors are a quick and easy alternative to soldering. They allow you to connect LED strip sections without special tools. Most connectors work with standard strip widths: 8 mm or 10 mm.

To make installation easier, our LED strip kits include 2 DC female-to-wire connectors, allowing you to quickly connect the strip to a power supply without soldering.

Step-by-Step Guide to Cutting LED Strip Lights

Measure the installation area.
Identify LED modules.
Cut at the manufacturer’s marks. Always cut along the printed cutting line or scissor icon.
Reconnect sections. Use soldering or connectors.
Test the strip before installing the lighting permanently.

Shop Quality LED Lighting

If you need reliable LED lighting for residential or commercial projects, explore our catalog of LED strip lights designed for modern interiors and architectural lighting.

For product recommendations or technical assistance, feel free to contact our team.

Phone: +1 (786) 615-4148
Email: info@theaccentlight.com

Address:
8284 NW 66th Street, Miami, FL 33166