There was a time when choosing a lightbulb was a simple task. Now it seems that the introduction of LED Bulbs has made things a little confusing. Finding 2 wattages on the same package is a typical issue.
When it comes to LEDs your light bulb will vary between 3-10w so the lowest number of the two will be what you are looking at and what you need to be careful of when comparing to new light fittings and what bulbs they can have in them.
