My bathroom has no windows and the light switch is in an awkward position to try to find.
I bought a small lamp and put a 10w CFL in it. It is on 24-7. It provides enough light for general bathroom use.
The CFL burned out just a few weeks ago, so I replace it with another. It ran 24/7 for about 4 years.
I replaced most of my lights with CFL years ago. I have only had 2 burn out. One was in a dining area light fixture; that bulb only lasted a few weeks. Its replacement still works. The other was the bathroom lamp light mentioned above.
I figure the lesser utility bills for the last 8 years have more than paid for the CFLs. I haven’t tried the LEDs yet, as they are still kind of expensive.