First, we need to point out the main keywords that you will need to look at on the product specification. You will find all of this information online in the product specification below the description and printed on the packaging.
- Wattage = energy used by the light
- Lumens = amount of light produced by light (brightness)
- Efficiency = amount of energy used that is converted to light
If you’ve bought incandescent bulbs before, you are probably used to checking the wattage to get an idea of how bright the bulb will be. This was the way we shopped for light bulbs for years. Because for incandescent lamps, the higher the wattage the brighter it is because it uses more power.
But wattage only actually tells you how much energy a bulb uses to convert into light. This is extremely important, particularly when looking for LEDs since these energy-efficient bulbs are designed to use less power and provide the same bright light. So, wattage is no longer a useful or accurate measure of brightness.
The infographic gives you a rough guide to how many lumens you should expect from LED lights from 4W to 18W.