How to choose an LED bulb

What lumens, watts, colour temperature and other LED bulb specifications mean.

The key point

When comparing LED bulbs, look first at lumens, which indicate the amount of light, rather than only watts. Watts indicate electrical power, while lumens help compare the light output.

Then check colour temperature, socket type, size, dimming compatibility and lifespan. When replacing an old bulb, look for equivalent illumination rather than simply the lowest wattage.

Practical tip

An efficient purchase should balance adequate lighting, energy use, lifespan and purchase price.

Conclusion

Choose the bulb based on the actual lighting requirement, not just the wattage printed on the package.