What lights are too bright? Are they all too bright? As mentioned if they are the double light fixtures just open them open and remove one bulb. If you are thinking you want a dimmer light in the bathroom, you can get a G4 base LED light. What I have found to make them fit nicely is to give the prongs a little bend (curve) so they stay in a wedge style base.
Here is one I have used in the TT, I thought it was to dim for my taste, for general lighting, but I had hoped to find a duplex switch so I could use it as a night light in bathroom.
Ebay LED G4 Lamp