LED Linear & Strip Light PCBs: Long-Format Engines, Flexible & Rigid-Flex Boards

Linear lighting is everywhere modern architecture wants a clean line of light — cove lighting, under-cabinet strips, architectural profiles, display cases, signage, and the continuous runs that wrap a building’s edges. The defining challenge is length: a board that is centimetres wide and metres long has to deliver even brightness and even color from one end to the other, which is a real electrical and manufacturing problem, not just a longer version of a normal board.

Highleap Electronics is a full-capability custom PCB fabrication and full PCB assembly factory that builds the full range of linear formats — long rigid engines, flexible strips, and rigid-flex constructions — plus the drivers and power injection that long runs require. This guide covers what makes a linear board work over length and how to order. The wider category is on our lighting PCB factory page.

What makes a linear light board different

A linear board is defined by its aspect ratio. Being long and thin creates challenges a compact board never faces: current has to travel the length of the board through copper that has resistance, so the far end can be dimmer than the near end (voltage drop); the board may need to flex or follow a curve; and manufacturing a board that is much longer than standard panel sizes takes panelization and joining strategy.

Get the electrical design right and a linear fixture is a clean, even line of light. Get it wrong and you see the tell-tale gradient — bright at the power end, dim and color-shifted at the far end. The board design, not the LEDs, is what prevents that.

Rigid, flexible, and rigid-flex linear engines

Linear lighting comes in three board constructions, and the choice drives everything about how the fixture is built and how it performs. We manufacture all three, and the deep engineering is in making each one even over length.

Rigid linear engines. For straight architectural profiles, troffers, and linear high bay, a long rigid board — aluminum metal-core for higher power, FR-4 for low-power indoor strips — gives the best thermal performance and the straightest line. The engineering centers on voltage drop and panelization:

• Copper sizing for length — wider and heavier copper buses so the current reaching the far LEDs does not sag, keeping brightness even end to end.
• Segmentation and joining — long fixtures are built from board segments joined with connectors or solder joints; we design the segments so the seams are invisible in the light output.
• Panelization — efficient layout on the manufacturing panel to build long boards economically.

Flexible strips. For cove lighting, curves, and signage, a flexible LED strip on polyimide bends to the architecture. The challenges are current distribution and durability:

• Power injection — feeding power at multiple points along a long LED strip so the middle and ends stay as bright as the feed point.
• Cut points — designed segments so the strip can be cut to length without wasting LEDs or breaking the circuit.
• Flex durability — copper and coverlay designed to survive bending during installation.

Rigid-flex. For fixtures that need both rigid LED-carrying sections and flexible interconnects — folded modules, fixtures that wrap a corner, or designs that eliminate connectors — a rigid-flex PCB combines both in one board. It removes failure-prone connectors and lets a single board follow a complex path, which is why premium architectural and signage fixtures increasingly use it.

The reason the construction choice is a deep design decision rather than a catalog pick is that each one solves the length problem differently — heavy copper buses on rigid, multi-point power injection on flexible, integrated interconnects on rigid-flex. Choosing and engineering the right one for the fixture’s shape, power, and length is exactly the kind of call we make during the DFM review, and building all three in one factory means the recommendation is driven by the design rather than by what a single-format shop happens to make.

Addressable and RGBW linear boards

Color-changing and dynamic linear lighting adds control complexity to the board. We build the full range:

• RGB and RGBW strips — multi-channel color mixing for architectural and accent schemes.
• Addressable (pixel) boards — individually controlled LEDs for chase, gradient, and video effects, a high-density LED layout with the control lines routed for signal integrity along the length.
• Tunable white linear — dual-channel warm/cool strips for adjustable architectural light.
• Signage and display modules — related LED display boards for channel letters and digital signage.

Addressable boards in particular need careful routing of data and power along the length so the signal stays clean and the color stays consistent — design work we handle as part of the build.

Drivers and power injection for long runs

Long linear runs need power delivered intelligently, not just a driver at one end. We build the drivers and design the power architecture together:

• Constant-voltage and constant-current drivers — matched to the strip or engine architecture.
• Power injection design — multiple feed points along a long run so brightness stays even, with the wiring planned into the fixture.
• Dimming and control — 0-10 V, DALI, PWM, and addressable controllers for the project’s system.
• Voltage-drop calculation — we calculate the drop over the run length and size copper and feed points to keep the far end bright.

Designing the board and the power delivery together is what keeps a 5- or 10-metre run looking like one even line instead of a gradient.

Linear PCB capabilities and finishes

We build linear boards across the full construction range:

The construction is matched to the fixture’s shape, length, power, and environment during the free DFM review.

One factory for the strip and its electronics

An even line of light over length depends on the board, the power injection, and the driver being designed as one. A strip shop that does not build drivers, or a driver shop that does not understand voltage drop over a flexible run, leaves the uniformity problem half-solved — and the customer sees the gradient.

Highleap Electronics builds rigid, flexible, and rigid-flex linear boards, designs the power injection and voltage-drop budget, and builds the matched drivers, all in one facility, at MOQ 1. Send your profile length, power, and color requirements to our PCB assembly team for a 24-hour quote.

How to Order — Files, MOQ & Lead Time

Ordering linear and strip boards from Highleap Electronics is simple whether you have finished files or just a profile length, power, and color spec. Every quote includes a free Design for Manufacturability (DFM) review, and our minimum order is a single unit with no prototype surcharge.

What files to send

• PCB fabrication only — Gerber RS-274X files (all copper, solder-mask, and silkscreen layers), Excellon drill file, board outline on the mechanical layer, and fabrication notes covering substrate, dielectric, copper weight, surface finish, and solder-mask color.
• PCB assembly (PCBA) — the above plus a Bill of Materials with manufacturer part numbers and quantities, and a Pick-and-Place (Centroid) file for the SMT components.
• Turnkey electronics — the above plus mechanical files (STEP/DXF) for the heat sink or housing, optic or lens details, driver or control specification, firmware if applicable, and any branding or packaging artwork. If files are missing, send what you have and our engineering team identifies the gaps during the DFM review.

MOQ and pricing

• Minimum order quantity is 1 unit for both fabrication and assembly, with no prototype penalty fee.
• Volume price breaks at 10, 50, 100, 500, and 1,000+ units.
• We retain your files so repeat orders skip re-quoting the engineering cost.

Lead times

• PCB fabrication — 5 to 7 business days standard; 24 to 48 hours express, subject to capacity confirmation.
• PCB assembly (PCBA) — 7 to 12 business days including component sourcing; 5 days express for an in-stock BOM.
• Turnkey modules — typically 12 to 18 business days depending on substrate, protection, and volume.
• All lead times are confirmed in your quote and begin from order confirmation and file approval.

Certifications and standards: ISO 9001 quality management, IPC Class 2 and Class 3 workmanship, AOI and functional testing on every board, with X-ray, ICT, and burn-in screening available. We ship to more than 40 countries with full tracking and provide compliance documentation on request. To start, email your Gerber files and BOM and we will respond within one business day.

Linear & Strip LED PCB — Frequently Asked Questions

How do you keep a long linear or strip light even from end to end?

By engineering for voltage drop. Current loses voltage traveling through copper, so the far end of a long run dims unless the board is designed for it. We size copper buses heavier, design multi-point power injection so a long strip is fed at several places, and calculate the drop over the actual run length. That keeps brightness and color even where a single-feed, thin-copper board would show a gradient.

Do you build flexible and rigid-flex linear boards, not just rigid strips?

Yes, all three. We build rigid long-format engines (aluminum or FR-4), flexible strips on polyimide for curves and cove lighting, and rigid-flex for fixtures that need rigid LED sections joined by flexible interconnects without connectors. We recommend the construction that fits your fixture’s shape, length, and power during the DFM review.

Can you build addressable (pixel) and RGBW linear boards?

Yes. We build RGB and RGBW color-mixing strips, tunable-white dual-channel boards, and addressable pixel boards with individually controlled LEDs for chase, gradient, and video effects. Addressable boards are a high-density design where we route data and power along the length carefully so the signal stays clean and the color stays consistent over the run.

What is the minimum order for linear and strip boards?

Our minimum order is 1 unit for both fabrication and assembly, with no prototype surcharge, so you can build and evaluate a run before committing to volume. Volume price breaks apply from 10 units up, and we keep your files for fast repeat orders. Quotes come back within 24 hours of receiving your Gerbers and BOM.