LORELAI: “Mom, tomorrow I’m going to build a house.”
RORY: Help build a house.
LORELAI: Did you tell them that there’s a light bulb in your closet that burned out in ’97 that you still haven’t changed?
The light bulb in Rory’s closet burned out when she was twelve or thirteen, possibly of an age where Lorelai could have changed the light bulb for her (mind you, that was the year Lorelai broke her leg, so she may not have been too mobile when it happened). Or what about Luke – he did tons of work on Lorelai’s house a few episodes ago while he was avoiding Rachel, couldn’t he at least have replaced a light bulb?