Hospital regulations do not permit the lighting of actual Sabbath candles in hospital rooms. Practicing Jews would typically use an electric light to perform this particular ritual. They are a simple fire hazard.
When Kutner is discussing his Sci-Fi college years he says he was a Klingon Dahar master at a convention, however he pronounces it dar rather than da-HAR suggesting the script didn't even spell it correctly let alone provide a clue to pronunciation.
When Wilson and House talk near the elevator, Wilson is holding his car keys. They are definitely not from the Volvo S80 he drives.