Restrooms are small spaces that are sometimes slippery, therefore occupants want to and have to be able to see well at all times.
When entering a restroom area, occupant shouldn’t have to look for the light switch or wait for the light to gain its full strength.
Light doesn’t have to be on all the time so intelligent sensors would have to make sure the light switches are on as soon as the occupant enters and off again when occupant leaves - for extra convenience and substantial energy savings.