JCB is a truly world-class brand. A brand synonymous with reliability, power and innovation. The range covers all lamp and cap types for most applications. This particular bulb is non-dimmable, however, we do have dimmable E27 bulbs available in our bulb categories. If you are choosing a dimmable LED, you may require a Trailing Edge dimmer switch. Please contact us if you’re unsure on your dimmer switch compatibility.