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How to Install LED Strip Lights

Installing LED strip lights has become a popular DIY project for homeowners and renters alike as it offers an energy-efficient and highly customizable way to add ambient or accent lighting to any suitable space. Whilst it is a generally straightforward process it is helpful to understand the components, steps, and potential pitfalls involved in installing this type of light. 

How to Properly Install LED Strip Lights

the word wow spelled with scrabble letters on a wooden surface
Photo by Ling App / Unsplash

Proper installation of LED strip lights will ensure they last and work as they should. Here are some steps below which can be used as a guide:

1. Planning and Preparation

  • Measure: Accurately measure where you are planning to install the strip and make a note of any corners or potential obstacles.
  • Choose the Right Strip: Consider the length that you will need; the brightness and the colour temperature you want from the lights.  Also think about where you are going to install the strip as you will need an IP65 rated strip if there is any chance of dampness getting onto or near it.
  • Test Components: Before mounting the strip, unroll it and connect it to the power supply unit and controller (if applicable). Take a moment to test all functions (such as turning it on, dimming, and color changes) to ensure everything works as you wish.
  • Clean the Surface: LED strip will only work on a clean, dry and smooth surface so it is crucial to make sure the area has been cleaned before you apply the strip.This is critical. We would suggest wiping the mounting area with isopropyl alcohol to remove dust, grease, and dirt and to let it dry completely before mounting the strip.

2. Mounting the LED Strips

  • Mark Cutting Points: If you are going to trim the strip to a smaller length, find the designated cutting marks and cut only at these marks.  These are usually indicated by a small dotted line and a small scissor icon.
  • Peel and Stick: Carefully peel back the adhesive protective paper and firmly press the strip onto the prepared surface. Do this slowly whilst applying steady pressure to ensure a strong bond between the strip and the surface.
  • Corners: For tight 90-degree corners, there are two ways to affix the strip:
    • Connectors: Use solderless quick connectors (L-shaped, T-shaped, or flexible jumpers) to make a clean break and turn.
    • Bending (Gently): If the strip is highly flexible, you can sometimes make a gentle, sweeping curve.  Be sure to avoid sharp folds however as this can damage the internal components.  The manufacturer packing or website should advise if the strip is flexible before purchase.
a stair case with a light on the side of it
Photo by Declan Sun / Unsplash

3. Wiring and Power Connection

  • Connecting Multiple Strips: If you are looking to connect pre cut pieces, use the appropriate solderless connectors or you can solder wires onto the copper pads.
  • Connecting to the Power Supply: Attach the end of the LED strip (or controller/dimmer, if used) to the PSU/Driver.  Ensure they have been wired correctly (positive to positive, negative to negative).  Always check the manufacturer’s instructions if you are unsure.
  • Final Test: Once everything is mounted and connected, plug the PSU/driver into the wall outlet for the final operational check.

What are Common Mistakes with LED Strip Lights?

Below are some common errors that occur when installing LED strip:

Error

Description

Solution

Poor Surface Prep

Installing the strip on a dusty, oily, or porous surface. Doing this will cause the adhesive to fail and the strip to fall down.

Clean the area with isopropyl alcohol and ensure it is dry before installing the strip.

Incorrect Power Supply

Using a PSU/Driver with insufficient wattage or incorrect voltage (e.g., 12V strip with a 24V PSU).

Calculate the total required wattage and select a PSU/Driver that provides the required total wattage.  You can calculate this by looking at the watts per metre and times this by the number of metres you have ordered.  You can purchase a PSU/Driver that has 10-20% of a higher number than your total. 

Cutting Outside the Lines

Cutting the strip in the middle of components instead of within the designated cut lines.

Only cut where the scissor icon and copper pads/lines are clearly visible. Cutting elsewhere will destroy the circuit and render that section useless.

Sharp Folds

Folding the strip sharply instead of using connectors or bending them gently.

We recommend you use L-shaped or T-shaped connectors for any clean 90-degree or corner turn.

Wired wrong

Connecting the positive (+) and negative (-) wires backwards.

The strip lights will not turn on. Simply reverse how you have connected them. 

Too hot

Installing high power strips without a heatsink (aluminum profile) in an enclosed space.

Use aluminum channels/profile to cover the strip as this will help dissipate heat and protect the strip.

Created by Adonia Watt on 28th January, 2026

Author

Adonia Watt

Adonia Watt