How to Wire LED Strip Lights: Feed Points, Gauge and Run Length

By DENO LED Lighting · 2026-08-25

Single-end, both-ends or mid-feed — how each wiring method changes maximum run length, what wire gauge to use, and how to size the driver for a 24V or 48V LED strip light.

Wiring an LED strip light is not just about polarity. The feed method decides how long the run can be before the far end visibly dims — and that is the failure most often blamed on "bad strips". Three legal feed methods Single-end feed — power enters at one end. Simplest, but the full run length carries the full current, so voltage drop is worst. Both-ends feed — power enters at both ends from the same driver. Each half carries half the run, so the effective electrical distance is L/2 and you can roughly double the run. Mid-feed (any mid-strip tap) — power enters at a point in the middle. Electrically identical to both-ends: each side sees L/2. On our constant-current strips, every segment has its own IC, so a tap at any cut point is valid. Wire gauge matters more than people expect The lead wire between driver and strip is part of the same circuit. On a 5m run at 14.4W/m, the tail alone can eat several percent of the supply voltage if it is undersized. As a working rule: use 20AWG for short tails under 300mm, 18AWG for longer tails, and step up again for any run over 2m of lead wire. Higher voltage is the easiest way to a longer run Doubling the supply voltage halves the current for the same power, which cuts voltage drop by roughly a factor of four. That is why long architectural runs move to 48V LED strip lights or 36V LED strip lights . For single uninterrupted runs of 10m to 20m, look at ultra-long LED strip lights , which combine higher voltage with heavier copper. Constant current vs constant voltage On a plain constant-voltage strip, brightness falls as voltage drops along the run. On a built-in IC constant-current strip , each segment regulates its own current, so the output stays flat until the segment runs out of headroom. For long runs with strict colour and brightness uniformity, constant current is the right answer. Sizing the driver Total load = W/m x metres. Add 20% headroom so the driver is not running at 100% continuously — that headroom is the cheapest lifespan you can buy. Confirm the exact figures for your layout with our wiring and voltage-drop calculator , which models single-end, both-ends and mid-feed side by side. Before you install Fix the feed method on the drawing, not on site. Send us the run lengths and we will confirm the copper weight, feed points and driver schedule for any model in the LED strip light catalogue .

Frequently asked questions

What are the primary considerations for how to wire LED strip lights to minimize voltage drop?

Minimizing voltage drop involves selecting an appropriate wire gauge for the run length and wattage, utilizing higher voltage LED strips (e.g., 36V or 48V), and employing feed methods such as feeding from both ends or mid-run. For longer runs, a larger wire gauge reduces resistance, ensuring more consistent light output across the strip.

How do I determine the correct wire gauge for a specific LED strip installation?

Wire gauge selection depends on the total current draw (calculated from total wattage and voltage), the length of the wire run from the power supply to the strip, and the acceptable voltage drop percentage. Consulting wire gauge charts that factor in these parameters is essential to prevent excessive voltage drop and potential overheating.

What are the advantages of feeding LED strip lights from both ends or mid-run?

Feeding LED strip lights from both ends or mid-run significantly reduces voltage drop by effectively halving the current path length for any given point on the strip. This method ensures more uniform brightness across longer runs, preventing noticeable dimming or color shift at the strip's end furthest from the power source.

What is DENO LED's typical lead time for custom LED strip light orders?

For custom LED strip light orders, DENO LED's typical lead time varies based on the complexity of the customization, order volume, and current production schedule. Generally, lead times range from 2 to 4 weeks after final design approval and deposit. Specific timelines are provided upon project quotation.