If you were to install a regular light bulb in the oven, you run the risk of it failing in the intense heat and shattering, though intense heat isn't the only reason why light bulbs pop or explode.
GE Appliances seems to be the talk of the town as of late. Whether it's a lamp you can talk to or an oven that doubles as a smoke alarm, it's safe to say the kitchen manufacturer is upping their game.