Very few energy saving light bulbs can be dimmed, which can be a problem if you want to use your existing dimmer switches. Available in popular sizes and fittings, Megaman Smooth Dimmerable energy saving light bulbs can be continuously dimmed from 10% to 100% using a rotary dimmer. If you don’t have a rotary dimmer, you can dim Megaman DorS Dimming energy saving light bulbs in steps using a normal light switch. Both feature Megaman’s superb Ingenium technology, giving the same fantastic 15,000 hour lifetime and fast 1 second start up time as their non-dimming energy saving light bulbs.