Not all lamps (bulbs) are the same.
If you are considering changing to LED lamps your existing wall dimmer switch may not work with the reduced load. If the existing dimmer does not function properly i.e. you cannot dim lights to zero, or the lamps do not dim at all you'll need a dimmer better matched to the load.
To save you replacing the entire dimmer switch (and struggling to find a matching wall plate) you could simply swap the dimmer module in your wall switch for one that will operate the reduced load.
If you do not already have the faceplate panic not as these can be bought at any DIY shed or Argos.
We offer a dimmer module can operate incandescent (tungsten lamps) or LEDs.
Incandescent - minimum 40w to maximum 250w.
LED - minimum 5w to maximum 125w.
In addition to operating with lower loads the dimmer has a trim control located on side - this can eliminate flickering issues when using LED lamps and control the minimum and maximum dimming levels when using LED lamps.