How to Connect LED Strip Lights
How to connect LED strip lights end to end or to a controller: connector types, matching pins and width, and what to avoid.
By Ethan Cole
Updated November 4, 2026
You connect LED strips to a power supply, to a controller, and sometimes to each other. Each connection has to match the strip’s voltage, width, and pin count. This guide explains the connector types and what to check. For our product picks see best LED strip lights.
The Short Version
Use a connector made for your strip’s width (listings mention 8 mm and 10 mm strips) and the right number of pins. Single-color strips use two pins, RGB strips four, RGBW five, and addressable strips three. Never connect strips of different voltage on the same supply.
Connector Types
| Type | Good for | Notes |
|---|---|---|
| Solderless clip connector | Joining two pieces or adding a lead wire | Needs the right width and pin count; check the clip seats on the copper pads |
| Soldered joint | Permanent, low-profile joints | Needs a soldering iron and practice |
| DC barrel plug (5.5 x 2.1 mm) | Power supply to strip | Several listings here use this plug; match polarity and voltage |
| JST 3-pin connector | Addressable strips | Used on WS2812B strips listed in our addressable guide |
Steps for a Clip Connector
- Unplug the power.
- Open the clip and slide the strip end in, with the copper pads facing the contacts.
- Close the clip and check that it is seated.
- Connect the other side to the next strip or a lead wire.
- Power on and look for flicker or a dark section, which usually means a poor contact.
Connecting to a Controller
Most kits have a plug that goes from the strip to a controller box and then to the power supply. Follow the arrows or labels, and do not use a controller meant for a different strip type: a single-color dimmer will not run an RGB strip.
What to Avoid
- Mixing 12V and 24V strips on one supply
- Joining strips with different numbers of pins
- Chaining beyond the maker’s maximum run
- Pulling hard on joints; strain relief helps
Who Should Look Elsewhere
- Do not want to join strips? Buy one long roll; see 100 ft LED strip lights.
- Working with addressable strips? Read the controller section of our connectors and controllers guide.
Frequently Asked Questions
Can I join two LED strips?
Yes, with a connector or solder, if they are the same type, width, and voltage.
Do I need to solder?
Not always. Clip connectors work for many strips.
Why does the second strip look dim?
Long runs lose voltage along the strip. Power the second strip from the other end or use a higher-voltage strip. See our 12V vs 24V guide.
Safety note: low-voltage LED strips are safer to handle than mains wiring, but their power supplies plug into household power. Use the supply in your kit or one that matches the strip’s voltage and wattage, keep it dry, and follow the manual. Anything that connects to a household circuit should be done by a licensed electrician.
Related: 12V vs 24V LED strip lights, how to cut LED strip lights, and LED strip connectors and controllers.
Check current pricing and availability for the DAYBETTER 16.4 ft Waterproof RGB LED Strip.
About the author
Ethan Cole leads research and editing at WikiHomeLED, comparing LED lighting for the home through manufacturer specs, manuals, safety listings and owner feedback. Every product is scored against the criteria on our How We Review page, and picks are updated when models change.