10m COB LED Strip Guide: Power Supply, Voltage Drop, and Installation

A 10m COB LED strip can be powered from one end only if the strip manufacturer permits that run length and the installation delivers acceptable brightness from end to end. Before ordering, confirm the strip’s rated voltage, power per metre, maximum continuous run, and recommended feed method, then size the power supply from the total load. For a long run, a 24V model or power injection at multiple points may help manage voltage drop, but the correct choice depends on the specific strip and wiring layout. In this guide, we explain how to assess power, plan installation, and request the details needed for a reliable B2B purchase.

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Who This Guide Is For

This guide is for lighting distributors, contractors, interior fit-out companies, and project buyers considering a 10m COB LED strip for indoor use. It is also useful when a project requires a continuous-looking line of light, such as under cabinets, in display shelving, or in coves. Our aim is to help you compare specifications and identify installation questions before committing to a product or quantity. Final electrical and installation decisions should follow the manufacturer’s instructions and local requirements.

How a 10m COB LED Strip Works

COB, or chip-on-board, describes how LED chips are arranged on a strip to create a closely spaced light-emitting surface. It does not, by itself, specify voltage, wattage, color quality, dimming compatibility, or the maximum length that can be powered from one end. Those details must be checked on the product datasheet. A 10m length describes the supplied or intended run, not necessarily the maximum length that can be connected as one electrical circuit.

Specifications to Confirm

For each candidate strip, request its rated voltage, power consumption per metre, total length, LED color and color temperature options, cutting intervals, IP rating, dimming method, and maximum recommended run. Also ask whether the supplier specifies a one-end feed, two-end feed, or intermediate power injection for the proposed length. These details affect the power supply, cable sizing, installation plan, and purchasing comparison. Avoid comparing products by the COB label alone.

Power Supply Sizing for a 10m Run

Start with the strip’s rated watts per metre and multiply by the installed length. For example, a hypothetical 10m strip rated at 10W/m has a connected load of 100W; at 24V, its nominal current is about 4.17A (100W ÷ 24V). These figures are an example for explaining the calculation, not a specification for every 10m COB strip. Use the selected product’s actual datasheet values when calculating your project load.

Allow Capacity and Check Compatibility

Choose a power supply with a rated output that meets or exceeds the calculated load, allowing suitable operating headroom in line with the power supply and strip manufacturers’ recommendations. For the 100W example, a supply rated at 125W would provide 25W of extra rated capacity; confirm that this approach is compatible with the selected equipment and operating conditions. Match the supply’s output voltage to the strip exactly, and check whether it is suitable for the intended dimmer or control system. A higher-wattage supply does not correct an incorrect voltage or an unsuitable wiring layout.

Also account for any additional connected loads, cable length, ambient conditions, enclosure, and access for maintenance. If several strip sections share one supply, calculate their combined load and confirm that the supply terminals and distribution wiring can support the total current. For projects with multiple zones, separate supplies or circuits may make control and troubleshooting easier. Ask your supplier to review the proposed wiring diagram before production or installation.

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Voltage Drop: Why Feed Design Matters

Voltage drop is the reduction in voltage along a conductor or strip as current flows through its resistance. On a long LED strip, this can contribute to lower brightness or a visible difference in light output between the powered end and the far end. The amount depends on the strip’s conductor design, load, supply voltage, cable length, and connection method. Because these factors vary by product and installation, a reliable estimate requires the relevant electrical specifications rather than length alone.

Ways to Manage Voltage Drop

• Consider 24V where appropriate: At the same power, a 24V system draws half the current of a 12V system. For example, a 100W load draws approximately 4.17A at 24V and 8.33A at 12V, before accounting for system losses. This can reduce current-related voltage drop, but does not remove the need to check the strip’s maximum run and wiring limits.
• Plan power injection: Feeding the strip at both ends or adding an intermediate feed can reduce the electrical distance from a supply point to part of the load. Use only a wiring arrangement approved for the product, and ensure connections are correctly sized and protected.
• Keep supply cables appropriate: Long or undersized supply cables can add voltage drop before power even reaches the strip. Ask the installer or supplier to verify cable sizing for the actual current and distance.
• Test a representative section: Where uniformity is important, test the chosen strip, supply, dimmer, and feed layout together before approving a large installation. This helps reveal issues that a product description alone cannot confirm.

Installation Planning and Application Matching

Before mounting, confirm the strip’s cutting marks, connector type, bend limitations, and minimum installation conditions in the product documentation. Measure the surface and plan the locations of the supply, cable routes, joints, and access points before cutting. Install on a clean, dry, suitable surface, and follow the manufacturer’s guidance for heat dissipation and mounting. Do not assume that adhesive backing alone is adequate for every substrate or environment.

Match the Strip to the Installation

For cabinetry and shelving, check the viewing angle, profile depth, and diffuser so that the light line suits the design. For coves or longer architectural runs, map feed points and concealment routes early, since access can be difficult after finishes are installed. A strip installed in an aluminum profile may benefit from a defined mounting surface and improved heat transfer, but profile suitability depends on the strip and installation. Confirm any indoor moisture or dust exposure against the specified IP rating rather than relying on appearance.

Buyer Selection Framework

1. Define the project: Record the run length, mounting location, desired light appearance, control method, and operating environment.
2. Compare electrical data: Check voltage, watts per metre, total load, maximum run, and recommended feeding arrangement on the datasheet.
3. Confirm system compatibility: Verify the power supply, dimmer, controller, connectors, and any profile are compatible with one another.
4. Request a sample or layout review: For appearance-critical or repeat projects, evaluate a representative setup before finalizing volume and installation details.
5. Clarify commercial terms: Ask for pricing, MOQ, sample availability, lead time, packaging, and delivery terms for the exact configuration. These vary by specification, order quantity, and production schedule, so obtain them in the quotation rather than assuming standard terms.

Supplier Evaluation Checklist

A qualified supplier should be able to provide a clear datasheet and answer practical questions about the proposed 10m installation. Ask whether the stated wattage is per metre or per reel, what feed arrangement is recommended, and which power supply characteristics are required. Request information about available color temperatures, dimming options, cut points, and customization, where relevant to your project. For bulk orders, confirm how the supplied configuration, labeling, and packaging will be identified.

At ENTA Lighting, we support B2B buyers by discussing strip specifications, power-supply matching, installation considerations, and configuration requirements before quotation. Share your target length, voltage preference, lighting effect, control method, and application environment so we can assess the appropriate options. Any product-specific recommendation should be checked against the final datasheet and project wiring plan. This makes the quotation more useful for procurement and installation teams.

Key Takeaways and Next Steps

A 10m COB LED strip is not automatically suitable for a single-end feed: the datasheet’s maximum run and the installation’s voltage-drop conditions determine the right arrangement. Calculate supply capacity from the actual watts per metre and length, match voltage precisely, and consider 24V or additional feed points where the product and project support them. Plan cable routes, mounting, control compatibility, and access before installation, then validate critical layouts with a representative setup. To move forward, send ENTA Lighting your run length, application, preferred electrical configuration, and control requirements for a specification review and project quotation.