When comparing LED strips, you often encounter technical specifications such as W/m (watts per meter) and lm/m (lumens per meter). But what do these values actually mean – and how do they affect the practical appearance of the lighting?
In this blog, we will briefly but clearly delve into what to consider when comparing the light output of LED strips.
Wattage ≠ brightness
One of the most common misconceptions is that more watts mean a brighter LED strip. However, this is not always true.
-
Wattage (W/m) indicates how much power the LED strip consumes.
-
Lumens (lm/m) indicate how much light the strip produces.
👉 For example, two different LED strips can both consume 10 W/m, but one may have a light output of 800 lm/m and the other up to 1200 lm/m – depending on the LED component used and efficiency.
Lumens – the most important metric for brightness
When you want to know how bright an LED strip is, the most important value is lumens per meter. Here's a rough comparison:
| Lumens/m | Application |
|---|---|
| 500–800 lm/m | Indirect lighting, mood lighting |
| 900–1500 lm/m | General lighting, e.g., in the living room |
| 1500+ lm/m | Effective task lighting, kitchen worktops, bathroom |
| 2000+ lm/m | Special applications, professional use |
💡 Tip: A good quality 10 W/m LED strip should have at least 1000 lm/m for sufficient light output for general use or indirect lighting.
Efficiency: lm/W
Another useful figure is lm/W, or lumens per watt. It indicates how efficiently the LED strip converts electricity into light.
-
80 lm/W = basic level
-
100–120 lm/W = good efficiency
-
130+ lm/W = very efficient strip
This figure helps identify energy-efficient options.
What does this mean in practice?
Examples:
🔹 Indirect lighting in the living room or bedroom
Choose at least an LED strip of about 10 W/m with a light output of 900–1200 lm/m.
Install in an aluminum profile for heat protection and a neat appearance.
🔹 Kitchen worktop lighting
The best choice is an approx. 15 W/m COB LED strip, which produces even and bright light without dots.
Combine with a dimmer and a sufficiently powerful 24V power supply.
Product recommendation from Valotehdas's selection
💡 COB LED strip 15W/m – very even light for the kitchen
Ideal for lighting worktops and bathroom mirrors. High light output and dot-free light.
💡 9.6W/m LED strip, approx. 900 lm/m – for general and indirect lighting
Versatile option for ceiling edges, TV backlighting or shelves.
Also remember:
-
When choosing a power supply, consider the total wattage and add a 20% safety margin
-
Do not exceed 5-meter lengths from a single feed without voltage drop compensation
-
The choice of profile affects both aesthetics and cooling
Summary
When choosing an LED strip, don't just look at the wattage – lumens and efficiency are key. By selecting the appropriate light output for your application, you ensure that you get exactly the lighting result you want.
Explore our selection of LED strips with different power outputs in our online store and ask for help if needed – we are happy to assist you in choosing the right product!
0 comments