Installation Guide • COB LED Strip Lighting
COB LED Strips: Professional Installation Guide
COB LED strips produce a smooth, continuous line of light that works especially well in visible architectural and accent-lighting applications. Installation is familiar to anyone who has worked with flexible LED strip lighting, but cutting, connecting, mounting, powering, and sealing the strip still need to be planned around the specific COB product being used.
Plan the complete COB lighting system before cutting, connecting, or permanently mounting the strip.This guide focuses on the COB-specific parts of the job. For the complete installation process—from planning and surface preparation through mounting and testing—see the LED Installation Guide →
What Makes COB Different From Standard SMD Strip Lighting?
Traditional SMD strip lights use individually packaged LEDs positioned along a flexible circuit board. COB, or chip-on-board, lighting places many small LED chips beneath a continuous phosphor layer. The result is a much smoother line of light with less visible spotting.
Visible Individual Light Sources
- Individual LED packages are visible along the strip.
- A diffuser can help soften visible dots.
- Available in many strip widths, voltages, outputs, and configurations.
- Connector and cut-point spacing varies by product.
A More Continuous Line of Light
- Produces a smoother, more continuous illuminated surface.
- Works well where the strip or its reflection may be visible.
- Requires connectors compatible with the specific COB strip.
- Cut-point spacing still varies by model and must be verified before cutting.
Neither construction is automatically the right choice for every installation. COB is particularly useful when visual smoothness matters, while SMD products may offer other advantages depending on output, configuration, cost, or application.
For a deeper comparison of strip construction, voltage, color temperature, CRI, and other selection factors, visit the LED Strip Lighting Guide →
Cut COB Strips Only at the Marked Cut Points
One of the easiest ways to damage an LED strip is cutting it somewhere the electrical circuit was not designed to be separated. COB strip lights must be cut only at the designated cut locations marked on the product.
Locate the Cut Mark
Look for the designated cut indicator, typically located near the exposed connection pads.
Make a Clean Cut
Use clean, sharp scissors or suitable cutting tools and cut through the marked location without tearing the flexible PCB.
Check the Contact Area
Make sure the connection pads remain clean and undamaged before installing a connector or soldering a lead.
If you're planning several cut sections, measure the project against the strip's actual cut interval before installation. That prevents finding out later that the strip cannot terminate exactly where the design requires.
COB Connectors vs. Soldering
COB strips can be connected with compatible solderless connectors or by soldering directly to the connection pads. Neither method is universally better. The right choice depends on the strip, access, environment, serviceability, and installer preference.
Plan and test connections before permanently mounting or concealing the LED strip.| Method | Useful When | Keep in Mind |
|---|---|---|
| Solderless Connector | Fast assembly, field installation, removable connections | Must match the strip width and contact layout. |
| Soldered Lead | Compact installations or permanent custom wiring | Requires soldering skill and careful heat control. |
Using COB Connectors
- Match the connector to the strip. Confirm strip width, conductor count, contact location, and COB compatibility.
- Check polarity. Positive and negative contacts must remain consistent throughout the system.
- Seat the strip completely. Partial contact can cause intermittent operation or increased resistance.
- Test before concealing the connection. Verify each segment before mounting it permanently.
Browse compatible connection components in Connectors & Accessories →
If You're Soldering
Use a temperature-controlled soldering iron and work quickly enough to avoid prolonged heat exposure to the strip. Tin the wire and contact pad before making the final joint, then allow the connection to cool without movement.
For polarity, conductor routing, parallel runs, and other wiring concepts, see the Wiring & Connections Guide →
Plan the Power Before You Mount the Strip
Long strip-lighting installations can develop voltage drop as current travels through the strip and its connecting conductors. The visible symptom is usually reduced brightness or color consistency farther from the power feed.
There is no single run-length number that applies to every COB strip. Maximum practical run length depends on factors such as operating voltage, strip wattage, PCB construction, conductor size, feed-wire length, and the brightness consistency required by the project.
Single-End Feed
Power enters at one end of the strip. This is often sufficient for shorter runs where voltage drop remains within the product's acceptable range.
Additional Power Feed
Feeding another point on the strip can reduce the distance current must travel through the flexible PCB and help maintain more uniform output.
Multiple Zones or Drivers
Larger layouts may be easier to manage as separate zones rather than forcing one continuous strip run to serve the entire project.
Mounting COB Strip Lighting
COB strips may look different when illuminated, but they still depend on a clean, stable mounting surface and appropriate installation method.
- Clean the surface first. Dust, oil, residue, or loose material can reduce adhesive performance.
- Avoid stretching the strip. Apply it naturally along the surface without pulling the flexible PCB tight.
- Respect minimum bend requirements. Do not sharply crease the strip or force it around corners it was not designed to follow.
- Use supplemental mounting when needed. Overhead, vertical, textured, warm, or difficult surfaces may require clips, profiles, or another mechanical mounting method.
- Plan connections before sticking everything down. Leave enough access to terminate, test, and service the installation.
The LED Installation Guide → covers preparation, mounting, testing, and general installation practices in more detail.
Does COB Need an Aluminum Channel or Diffuser?
Not always. One advantage of COB lighting is that its output is already visually smooth, so a diffuser may not be necessary simply to hide individual LED points. But channels and diffusers can still provide mechanical protection, mounting structure, thermal support, or a particular finished appearance.
When a Channel May Not Be Necessary
- The strip is concealed inside a cove or recess.
- The mounting surface is suitable for the product.
- The installation does not need additional mechanical protection.
- The exposed COB appearance already provides the desired finish.
When a Channel Can Help
- The strip needs additional physical protection.
- A clean architectural profile is part of the design.
- The mounting surface is unsuitable for adhesive alone.
- Thermal or structural requirements call for a dedicated mounting profile.
Installing COB Strips in Damp or Wet Locations
A waterproof or moisture-resistant strip is only one part of a wet-location lighting system. Cut ends, connectors, wiring transitions, drivers, controllers, and enclosures must also be suitable for the actual environment.
Protect Every Cut and Termination
Cutting an encapsulated strip can expose the internal PCB. Follow the product's sealing instructions for cut ends and connection points before placing the strip into service.
Check More Than the IP Rating
Power components, connectors, enclosures, cable entries, and mounting methods also need to be selected for the installation environment.
For help interpreting environmental ratings and selecting components for dry, damp, and wet locations, see the IP Ratings & Environment Guide →
Think Beyond the Strip: Build the Complete COB System
A successful COB installation depends on more than the strip itself. Voltage, power capacity, control method, wiring, connectors, environment, and mounting all need to work together.
Choose the COB Strip
Select voltage, color temperature, output, environmental rating, and the physical strip format for the application.
Explore COB Lighting →Size the Driver
Match the strip voltage, calculate the connected load, and select enough driver capacity for the planned system.
Power & Driver Guide →Plan Dimming
Make sure the dimmer, controller, and LED driver are designed to work together before installation.
Dimming & Controls Guide →COB Pre-Installation Checklist
- Confirm the strip voltage and power-source voltage match.
- Verify the wattage requirement and driver capacity.
- Confirm the strip's marked cut interval before measuring final segments.
- Verify connector width and contact compatibility.
- Plan additional power feeds or zones where required.
- Confirm dimmer, controller, and driver compatibility.
- Verify environmental ratings for every exposed component.
- Clean and prepare the mounting surface.
- Bench-test the complete system before permanent mounting.
Planning a larger installation? The LED Lighting System Planning Worksheet → can help organize the project before installation begins.
Common COB Installation Mistakes
Cutting Outside the Marked Location
Cutting through an unintended part of the circuit can damage the segment. Locate the manufacturer's designated cut point before every cut.
Assuming Any Strip Connector Will Fit
Strip width alone does not guarantee compatibility. Confirm the connector's contact arrangement and COB compatibility.
Ignoring Voltage Drop
Long runs should be planned around the electrical limits of the actual strip, not a generic maximum-distance rule.
Mounting Before Bench Testing
Testing the complete system first can reveal connection, polarity, dimming, or power problems while everything is still accessible.
Protecting the Strip but Not the Connections
A wet-location strip does not automatically make every connector, wire transition, driver, or controller suitable for the same environment.
Treating Components Independently
Strip, driver, dimmer, wiring, and connectors form one electrical system. Compatibility should be planned before installation starts.
Useful Resources Before You Install
LED Installation Guide
Surface preparation, mounting, testing, placement, and general installation planning.
Read the Guide →Wiring & Connections
Learn about polarity, conductors, connections, routing, and power distribution.
Read the Guide →LED Wattage Calculator
Estimate the required power capacity for the strip length and load you're planning.
Calculate Wattage →LED Troubleshooting Guide
Work through common symptoms including flickering, dim sections, connection problems, and power issues.
Troubleshoot a System →Build the System Around the Installation
Start with the COB strip and project requirements, then match the power, control, wiring, and connection components around the complete system.