r/Lightbulb is a subreddit with 117k members. The most common kinds of discussions are ideas and solution requests, and the community frequently discusses hate, idea, ai, annoying notifications, and looking for a startup idea.
A community for sharing ideas, inventions, and plans.
Popular Themes in r/Lightbulb
#1
Ideas
: "Canada should sabotage Trump’s “Lake America” by renaming Lake Erie “Lake America” too, making the name useless for communication"
134 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
Self-Promotion
: "I’m Creating Parts Pal: A Simple Way to Track Your Car, Parts, and Mechanics"
3 posts
#4
Advice Requests
: "If you could solve one global problem, what would it be?"
1 post
#5
Money Talk
: "What if Americans stopped spending $25,000 on wedding receptions and gave the money to poor families instead?"
1 post
Popular Topics in r/Lightbulb
#1
Hate
5 posts
#2
Idea
3 posts
#3
Ai
: "TV show idea: A medical comedy where cheap, on-demand MRIs, 3D printing, and Ai make every patient a challenge for doctors."
3 posts
#4
Annoying Notifications
2 posts
#5
Looking For A Startup Idea
2 posts
#6
Worst Ads
1 post
#7
Worst Devil
1 post
#8
Annoying Scrolling
1 post
#9
Annoying Jersey Cleaning
1 post
#10
Annoying Ads Replacement
1 post
Member Growth in r/Lightbulb
Yearly
+5k members(4.4%)
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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 31, 2026