What’s a Watt?


All light bulbs are rated in Watts - but what’s a Watt?

Named after the inventor of the steam engine, James Watt, the Watt (W) is an international standard unit of power. Much like the power of a car might be measured in “Horsepower”, the power used by a light bulb is measured in Watts. In fact there are 746 Watts in a Horsepower.

The higher the “Wattage” of a lamp, the more electricity it uses and the more it costs to run.

Generally, the higher the “Wattage” of a light, the brighter it is, but this does however depend on the type of lamp. All of the following give about the same amount of light:-