A 20m–30m COB lighting project needs a plan for the complete installation: the illuminated sections, power feeds, cable routes, mounting conditions and approval process. Selecting a strip by watts per metre or a lumen figure alone does not establish how the finished line will perform.
This guide is for buyers, lighting brands and project engineers who are already evaluating a long-run 48V installation. Its purpose is to help you prepare a supplier brief and sample acceptance plan before committing to a production configuration.
If you are still deciding between 24V and 48V, see our 24V vs 48V LED strip comparison. The steps below assume that a 48V COB solution is under consideration.
1. Confirm the Required Continuous Run Length
Begin with a dimensioned drawing of each illuminated section. Separate the length of one electrical run from the total project quantity. A project requiring several 20m lines is different from one continuous 30m line, even if the total number of metres ordered is similar.
Mark corners, joints, changes in level, access panels and the locations where power can reach the strip. Identify any points where the line can be divided into separate circuits. A long physical reel and a single-feed electrical run are different requirements; state which one the project needs.
- Required length of each continuous illuminated segment.
- Total number of segments and total quantity, including separately identified spares.
- Permitted feed locations and the distance from each supply to the strip.
- Profile dimensions, mounting surface, cable exits and maintenance access.
- Any restriction on joints, dark gaps or visible wiring.
When screening the available platforms, use the COB LED strip range to identify the relevant construction. Then obtain the exact model specification rather than applying a family-level run-length description to every product.
2. Confirm the Electrical Configuration
The strip, power supply, controller and accessories must be compatible with the selected 48V system. Give the supplier the actual dimming or control requirements and identify any components that have already been selected. A current rating alone does not establish that a controller or connector is suitable.
Prepare a feed diagram showing the supply location, cable route, connectors and the beginning and end of each strip circuit. Ask the project engineer to review cable length and conductor selection together with the load. Do not assume that a connection arrangement used on another strip is suitable for this configuration.
For initial load planning, multiply the selected strip’s nominal watts per metre by the proposed length. Treat this as a nominal load estimate, not a measured input-power result or a final driver selection. Review the supply’s continuous output capability, installation temperature, derating guidance and the manufacturer’s loading requirements before approval.
Confirm whether the proposed model is intended for a single-end feed or another arrangement, and record any conditions attached to its stated maximum length. Keep the feed arrangement conditional until the strip, supply, cable assembly and installation have been reviewed together.
3. Evaluate Voltage Drop and Brightness Consistency
Voltage can be lost along the feeder, connectors and strip conductors. The effect on the visible light line depends on the strip’s circuit design and operating conditions. A nominal 48V input does not remove the need to check the farthest illuminated point.
Define how the line will be evaluated before requesting a sample. Record where voltage will be measured and where light output or appearance will be compared. Use consistent measurement geometry and operating settings when comparing the beginning, middle and end of the run.
Agree the acceptable visual or measured variation with the project team. This article does not prescribe a universal percentage. An approved limit should reflect the intended application and the measurement method used to assess it.
Catalogue specifications help identify a candidate product. Project-specific validation establishes whether that candidate meets the required appearance across the actual circuit. Do not treat a photograph of a short sample as proof of a complete long-run installation.
4. Check Power and Thermal Performance
Review actual input power on the selected sample assembly. Record the strip model, tested length, supply voltage, controller setting and feed arrangement so that the result can be matched to the proposed production configuration. Keep measured power separate from the nominal wattage used in the initial bill of materials.
Evaluate the proposed mounting surface and any aluminum profile, diffuser or enclosure. Mounting details can affect heat dissipation and the appearance of the finished line. A sample evaluated in open air does not automatically represent a concealed or enclosed installation.
Record the ambient conditions and allow the assembly to reach the agreed operating condition before comparing measurements. Use the product and component manufacturers’ limits and the project’s approved criteria. No universal temperature limit or guaranteed thermal outcome is assumed here.
Also review cable terminations and connectors under the intended load. Problems in a connection or feeder can affect the assembly even when the strip itself is appropriate. Assign responsibility for approving the complete electrical and mounting arrangement.
5. Validate a Sample Before Mass Production
HST Light can support project-specific sample evaluation before mass production. Define the sample scope with the supplier: use the full proposed length where necessary, or document why a representative assembly addresses the project’s risks. A short sample alone cannot establish the performance of the untested full run.
- Identify the exact model, revision, CCT, length and mounting configuration.
- Confirm the supply, controller, cables, connectors and feed arrangement used for evaluation.
- Check voltage at the feed and at agreed points along the line.
- Compare beginning-to-end brightness and visual consistency using an agreed method.
- Review actual power draw and thermal behaviour under the intended installation conditions.
- Document unresolved issues, acceptance criteria and any changes that require another sample review.
The buyer’s approval record should connect the sample, its results and the proposed production specification. If the length, circuit, mounting or component selection changes, review whether the earlier approval still applies. Preparing a sample does not itself release a configuration for volume production.
For repeat supply or a custom assembly, HST Light’s OEM/ODM project support can help organize specification review and sample questions. Describe the evaluation needed; do not assume that a particular report or outcome already exists.
6. Information to Send When Requesting a Quote
A useful inquiry lets the supplier assess the installation rather than quote only a reel quantity. Send a drawing or marked-up sketch with the following information. If a choice is still open, identify it as a requirement to review rather than presenting it as an approved specification.
- Required continuous run length, number of runs and total order quantity.
- Required CCT and the intended application, such as a corridor, cove or retail perimeter.
- Indoor, damp or waterproof requirement, including the installation environment.
- Proposed mounting profile, diffuser or enclosure, with relevant dimensions.
- Available supply positions, cable lengths, cable exits and connection requirements.
- Dimming or control method and any fixed power supply or controller selection.
- Sample acceptance requirements and who will approve the configuration.
- Expected delivery schedule, including the time needed for sample review.
Ask the supplier to separate confirmed product specifications from project-dependent proposals. Request clarification of any open mounting, power-feed, protection or documentation requirement before approving the bill of materials. A requested delivery date is a planning input, not a confirmed production lead time.
7. When a 48V Long-Run COB Solution Makes Sense
A long-run COB solution is worth evaluating when the project needs a continuous light line across an extended corridor, cove or perimeter and the feed locations or maintenance access are constrained. Its suitability still depends on the selected model, required light output, mounting and electrical layout.
HST Light’s 48V Long Run COB LED Strip is a product option to review against that brief. The published specification for model HST-FCOB480-10-DC48V describes a long-run platform for up to 30m with single-end power, subject to project-specific electrical and thermal review. That specification is not an acceptance result for every 20m–30m installation.
Confirm the current model data and the conditions behind the proposed run before ordering. If the full configuration does not meet the project’s agreed criteria, revisit the feed layout, circuit segmentation or other design choices with the supplier and project engineer. Keep the final production decision tied to the reviewed sample and specification.
Request a Project Quotation
Need to evaluate a 20m–30m COB lighting project? Review the 48V Long Run COB LED Strip above or request a project quotation. Send your run lengths, application, CCT, feed constraints and quantity so the team can review the configuration and the sample evaluation needed before production approval.