Troubleshooting

Why does my LED strip flicker?

Flicker is almost never the LED. It is the driver, the dimmer or a bad joint. Find which one in three steps.

What we need to confirm it

  • Flickers with dimmer on / off? Which section? Strip length and driver rating?

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Diagnosis

Cause, then fix

Dimmer / driver not compatible

Cheap leading-edge (trailing phase-cut) household dimmers cut the waveform in a way cheap constant-voltage drivers cannot hold. The strip strobes at low output.

Fix: Use a trailing-edge dimmer rated for LED, or PWM / 0-10V / DALI driver built for LED loads.

Undersized or failing driver

A driver at 90% of its rated load overheats; its output ripple shows up as flicker across the whole run.

Fix: Size the driver at 1.3x the strip load and check the warranty period, not just the price.

Loose connector or cold solder joint

Flicker on one section only, and it moves when the cable is touched — that is a joint, not a driver.

Fix: Re-crimp or solder that joint. Avoid screw terminals on strips; they loosen with thermal cycling.

Strips connected in series beyond spec

Chaining reels through the tail connector stacks resistance and starves the far end, which strobes at the boundary.

Fix: Power each 5 m reel from its own feed. Series length is limited by the datasheet, not by common sense.

Spec that avoids this

Strips used to build it properly

SMD2835 LED Strip 120 LEDs/m

SMD2835 LED Strip 120 LEDs/m

High-efficiency SMD2835 strip — the most widely used solution for linear general lighting in commercial and residential projects. Available in 60 / 120 / 180 LEDs/m versions.

9W/m (120 LEDs/m); 5W/m (60 LEDs/m); 18W/m (180 LEDs/m) · DC12V · IP20 / IP44 / IP65 (IP68 with silicone sleeve on request)

COB LED Strip 480 LEDs/m

COB LED Strip 480 LEDs/m

Continuous dot-free light line with chip-on-board technology. Uniform output with no visible LED spots, even on glossy or reflective surfaces.

10W/m (8W/m / 12W/m / 15W/m optional) · DC24V (DC12V optional) · IP20 / IP65 / IP67

Pick a strip that will not do this

Tell us the run and the driver you already have. We quote a combination that is compatible, not just cheap.

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