r/Lightbulb is a subreddit with 117k members. The most common kinds of discussions are ideas and solution requests, and the community frequently discusses ai, movie, idea, game, and annoying notifications.
A community for sharing ideas, inventions, and plans.
Popular Themes in r/Lightbulb
#1
Ideas
: "Movie idea: A flight over the Pacific discovers news reports saying it already crashed."
115 posts
#2
Solution Requests
: "I can't find a set of pool (billiard) balls where the cue ball is white (like our sun) and the other balls look like the planets in our solar system."
6 posts
#3
Advice Requests
: "Built a news aggregator where AI rewrites headlines based on your political perspective - would love feedback!"
6 posts
#4
Self-Promotion
: "Built a tool that automatically schedules your TV watching for you"
3 posts
#5
Opportunities
: "Lost opportunity?"
1 post
Popular Topics in r/Lightbulb
#1
Ai
: "TV show idea: A medical comedy where cheap, on-demand MRIs, 3D printing, and Ai make every patient a challenge for doctors."
7 posts
#2
Movie
: "Horror Movie idea: former teachers haunt an unemployed former gifted student to force him to write a novel that fulfills their unrealized ambitions."
7 posts
#3
Idea
: "Idea: Email clients should let you “burn” annoying emails from people you know (purely visual, just for satisfaction)"
6 posts
#4
Game
: "Five Nights At Freddy's: The Card Game"
3 posts
#5
Annoying Notifications
2 posts
#6
Looking For A Startup Idea
2 posts
#7
School
: "Idea: Each School/university exam should ask you to write the number of hours that you studied for it beside your name as a way to give you better feedback on your potential in that subject."
2 posts
#8
Puzzle
: "Tile Wipeout — a new kind of slider Puzzle where you rotate rows and columns to remove tiles by matching them to the grid’s edge colors."
2 posts
#9
Horror Movie
: "Horror Movie idea: former teachers haunt an unemployed former gifted student to force him to write a novel that fulfills their unrealized ambitions."
2 posts
#10
Religion
: "Movie idea: A private space company is secretly funded by a Religion that fears alien life, and together they sabotage the search for it by contaminating the solar system."
2 posts
Member Growth in r/Lightbulb
Yearly
+5k members(4.3%)
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About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/Lightbulb, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: August 2, 2026