I spend a lot of time visiting jewelry stores for the purpose of surveying the store’s jewelry display lighting, i.e. the lighting inside and above the showcases. On my visits to these stores I often times find myself sitting in the office, across the desk from the owner discussing lighting options for the store. From time to time, the occupant of the desk will point to the diamond grading lamp on his or her desk and ask me if I have any replacement bulbs for the lamp. The