How Bright Should LED Strip Lights Be? Lumens per Metre Guide

Specify brightness in lumens per metre (lm/m), never in watts. Watts tell you what the strip consumes; lumens tell you what it delivers. Two 14.4W/m strips can differ by more than 40% in output depending on LED grade and copper weight. Target ranges by application Accent and cove uplighting — 400 to 800 lm/m. Enough to wash a ceiling without creating a visible bright band. Under-cabinet and shelf lighting — 700 to 1,200 lm/m at close range. Retail display and joinery — 1,000 to 1,800 lm/m, usually paired with high CRI. Task, industrial and linear replacement — 1,800 to 3,000+ lm/m from high-efficacy LED strip lights . Efficacy decides the wattage you need Efficacy (lm/W) is the conversion rate between the two. At 100 lm/W you need 10W/m for 1,000 lm/m; at 200 lm/W you need only 5W/m. Higher efficacy means less heat, longer life, a smaller driver and a lower running cost for the same light on the surface — which is why it is the first spec to push on any large project. Do not forget the losses The datasheet figure is bare-strip output. A frosted diffuser typically absorbs 10% to 20%, and a deep profile shades some of the beam. Specify roughly 20% above your target so the installed result matches the design intent. Wider strips carry more light There is a physical ceiling to how much a 8mm FPCB can dissipate. For very high output, a wide LED strip light spreads the LEDs and the heat across more copper. Where the light has to be pushed a distance or held to a narrow beam, a lensed LED strip light concentrates the output instead of raising the wattage. From lumens to lux Clients specify lux on a surface, not lumens in a strip. Our illuminance and flux calculator converts between the two for a given mounting height, beam angle and room reflectance — so you can size the strip before the mock-up. Get a spec check Send us the target lux and the section, and we will match a model from the LED strip light catalogue with the measured lm/m to hit it.