Lumen per Watt (lm/W) indicates how efficient a lamp is. It shows how much light (lumens) a lamp produces per Watt of energy consumed.

The higher this value, the more light you get for the same energy consumption.

Why is lm/W important?

The lm/W value helps you compare lamps in terms of efficiency:

• High lm/W: lots of light, low energy consumption
• Low lm/W: less light, higher energy consumption

An efficient lamp therefore saves both energy and costs.

Comparison of different lamps

• LED lamps: on average 100+ lm/W
• Incandescent lamps: approximately 10–15 lm/W

LED lighting is therefore much more efficient and sustainable than traditional lighting.

What does this mean in practice?

If you choose a lamp with a high lm/W value, you benefit from:

• Lower energy costs
• Less energy consumption
• A more sustainable choice

In short: the higher the number of lumens per Watt, the more efficient and economical the lamp.