All incandescent bulbs are dimmable. All our LED globes are dimmable, however the the right dimmer needs to be used. Generally a Trailing Edge or Universal dimmer should be used for LED. We recommend a Clipsal Universal as a general starting point.
Our current update to our 240V LED bulbs give much better dimming performance across a wider range of dimmer switches. Look for bulbs that are listed including Double IC deep dimming system in the specifications tab.