Generally, the punch line answer highlights a stereotype of the target group.
There are numerous versions of the lightbulb joke satirizing a wide range of cultures, beliefs, and occupations.
Although lightbulb jokes tend to be derogatory in tone (e.g., "How many drunkards..." / "Four: one to hold the light bulb and three to drink until the room spins"), the people targeted by them may take pride in the stereotypes expressed and are often themselves the jokes' originators.
Lightbulb jokes applied to subgroups can be used to ease tensions between them.
[8] Some versions of the joke are puns on the words "change"[9] or "screw",[10] or "light": Q.
[14] For example, the lightbulb may not need to be changed at all due to ongoing power outages.
Lightbulb jokes can also be about sports, teasing about their team's past, future, etc.
Lightbulb jokes can also be related to religious groups and denominations.