Custom COB LED Light Sources for Device Manufacturers
Leienda supplies COB LED light sources and project-based LED modules for manufacturers building red light therapy devices, beauty instruments, UV curing systems, horticulture lighting, machine vision lights and other functional lighting products. Leienda supplies the internal LED light source, SMT LED board or PCBA light module, not the finished device.
What Is a COB LED Light Source?
Chip-on-Board (COB) means multiple bare LED chips are mounted closely and directly onto a thermally conductive substrate to form a single, compact light-emitting surface.
For B2B procurement and engineering teams, the concept is straightforward. The critical task is confirming the exact parameters for the project: emitting area, substrate material, power requirement, wavelength / CCT, CRI, forward current, forward voltage, and the thermal path.
COB LED Product Options
Available for project review. Customizable by requirement based on your device specifications.
White COB LED Light Sources
For commercial lighting, inspection lighting, and equipment internal illumination.
Red & Near-Infrared COB LED
For red light therapy and beauty device manufacturers requiring specific wavelengths.
UV COB LED Light Sources
For UV curing or sterilization system manufacturers.
Custom Spectrum COB LED
For horticulture lighting and special lighting manufacturers requiring precise blends.
COB LED on Custom PCB / PCBA Module
For projects where clients already have existing housing structures or mechanical drawings. We integrate the COB source onto the required board.
COB LED Parameters for Project Review
Engineering specifications to be defined before sample build and batch production.
| Product Type | COB LED light source / custom COB LED module |
|---|---|
| Wavelength / CCT | e.g. 630nm, 660nm, 850nm, 940nm, UV wavelength, warm white, neutral white, cool white |
| Power Range | confirm by project requirement |
| Forward Voltage / Current | confirm after LED structure and circuit design |
| Substrate | ceramic substrate / aluminum substrate / custom PCB (if applicable) |
| Emitting Area | custom or model-based |
| Module Size | based on drawing |
| CRI | for white COB projects when required |
| Beam Angle / Optical Surface | confirm by lens, phosphor surface or structure |
| Thermal Design | depends on power, substrate and housing heat path |
| Connector / Solder Pad | based on assembly method |
| Testing Items | wavelength, brightness, forward voltage, soldering, aging, visual inspection |
Common Sourcing Challenges for COB LEDs
1. The COB LED fits the optical target but not the housing space
Constraint: Standard COB dimensions often clash with compact device designs.
Leienda Solution: We review the PCB size and emitting area against your drawing before sample build.
Benefit: The light source fits perfectly into your mechanical design without structural rework.
2. Wavelength or CCT samples pass, but batch supply drifts
Constraint: Inconsistent LED binning causes noticeable color or performance shifts in mass production.
Leienda Solution: Strict wavelength binning and CCT range sorting aligned with the approved sample.
Benefit: Batch-to-batch consistency for your end products.
3. Power is selected without checking heat dissipation path
Constraint: High power density COBs overheat if the substrate or device housing cannot transfer heat quickly.
Leienda Solution: We evaluate thermal behavior observation and substrate (ceramic/aluminum) suitability based on power.
Benefit: Prevents premature LED degradation and extends product lifespan.
4. Connector, solder pad or mounting hole position affects assembly
Constraint: Standard modules require manual wire soldering, increasing assembly time and error rates.
Leienda Solution: Custom PCBA modules with defined connector positions and mounting holes aligned with your BOM.
Benefit: Plug-and-play assembly on your production line.
Engineering Support for COB LED Projects
Precise Source Selection
LED emitter and COB light source selection based strictly on your target wavelength, CCT, power, and final application. We match the current and forward voltage to your driver design.
PCB & Substrate Review
Thorough PCB size and substrate review before sample build. We verify mounting holes and heat dissipation paths to ensure physical compatibility.
SMT & PCBA Integration
SMT LED board and PCBA light module support when the COB source needs to fit a specific device structure, including precise connector positioning.
Rigorous Sample Approval
Sample approval process includes verification of wavelength, forward voltage, brightness, and thermal observation based on required sample quantity.
Aligned Batch Production
Batch production documents are strictly aligned with your BOM, testing items, and the approved sample.
We plan production based on your estimated annual demand, ensuring aging tests and soldering inspections are consistent across all deliveries.
COB LED vs SMD LED
Understanding the structural and application differences for your project.
COB LED Light Source
COB LED is better when the project needs a compact light-emitting surface, higher light density in a limited area, or a module built around a defined optical window.
- Structure: Multiple chips bonded directly to one substrate.
- Light Density: Very high, continuous luminous surface.
- Heat Concentration: Centralized; requires excellent thermal path.
- Circuit: Single circuit driving multiple chips internally.
SMD LED Array
SMD LED is better when the project needs distributed LED points, flexible layout, multi-position placement, or easier replacement of individual LEDs.
- Structure: Individual packaged LEDs soldered onto a PCB.
- Light Density: Distributed, distinct light points.
- Heat Concentration: Spread across the PCB area.
- Circuit: Flexible routing on the PCB surface.
Applications for Device Manufacturers
Red Light Therapy Device Manufacturers
We resolve wavelength matching (e.g., 660nm/850nm combinations) and mounting hole alignment for your panel or wearable device designs.
Beauty Instrument Manufacturers
Addressing limited housing space and thermal behavior during continuous operation with compact, customized COB modules.
UV Curing System Manufacturers
Providing high power density UV COB sources with verified ceramic substrates to handle extreme heat loads.
Horticulture Lighting Manufacturers
Ensuring precise custom spectrum combinations and strict sample approval before batch order for plant growth fixtures.
Machine Vision Lighting Manufacturers
Delivering high brightness and uniform emitting areas with specific connector compatibility for automated inspection systems.
Industrial and Medical Equipment Builders
Supplying reliable internal light sources with documented batch consistency and forward voltage stability.
How to Choose a COB LED for Your Project
Confirm application and optical target
You provide: The end-use of the device and the expected light output or function.
Leienda confirms: Whether a standard COB or a custom PCBA module is the right technical direction.
Choose wavelength or CCT
You provide: Specific nm values (e.g., 660nm) or color temperature requirements.
Leienda confirms: Availability of chips and the required wavelength binning tolerances.
Define power, current and voltage
You provide: Driver specifications or target power consumption.
Leienda confirms: The internal LED circuit layout (series/parallel) to match your forward voltage and current.
Check emitting area, module size & heat path
You provide: Mechanical constraints, housing space, and heat sink capabilities.
Leienda confirms: PCB size, substrate material (aluminum/ceramic), and ensures the thermal design prevents overheating.
Confirm connector, solder pad and mounting holes
You provide: Assembly preferences (wire soldering vs. plug-in connectors) and screw hole coordinates.
Leienda confirms: The layout on the custom PCB to match your assembly line needs.
Build sample and approve testing items
You provide: Sample quantity required for pilot run.
Leienda confirms: Delivery of samples with documented wavelength, forward voltage, and brightness data.
Testing and Batch Consistency
To reduce parameter drift, assembly rework, and incoming inspection time during sample approval, pilot run, and batch purchasing, Leienda executes specific engineering tests for every project.
- Wavelength range check
- CCT / CRI check (white COB)
- Forward voltage test
- Brightness / luminous flux check
- Soldering inspection
- Aging test
- Thermal behavior observation
- Batch traceability
Submit Your Project Information
Provide your requirements for a precise evaluation. We will review your drawing or parameters and get back to you with feasibility and sample details.
Fast Communication
Frequently Asked Questions
What is a COB LED?
What is the difference between COB LED and SMD LED?
Can Leienda customize COB LED wavelength or CCT?
What information should I provide before requesting a COB LED sample?
Can COB LED be used for red light therapy or near infrared devices?
What should be checked before using UV COB LED?
How does thermal design affect COB LED performance?
Can Leienda supply COB LED with SMT LED board or PCBA light module support?
How do you confirm COB LED samples before batch production?
Send Your COB LED Light Source Requirements
Invite buyers to submit wavelength / CCT, power, emitting area, PCB size, connector, mounting holes, sample quantity, annual demand and application for a thorough engineering review.