r/Lightbulb is a subreddit with 117k members. The most common kinds of discussions are ideas and solution requests, and the community frequently discusses idea, app, ai, movie, and technology.
A community for sharing ideas, inventions, and plans.
Popular Themes in r/Lightbulb
#1
Ideas
: "Since Amazon backed down in listing tariff costs, someone should make a browser extension that does exactly that."
94 posts
#2
Solution Requests
: "A stationary bike I can ride at night to charge up my e-bike so I can ride to work in the morning and not arrive to work sweaty, but still know I put in the effort."
24 posts
#3
Self-Promotion
: "I’m building a free app for car spotters - would love your feedback"
4 posts
#4
Opportunities
: "Blackberry not using Ram Jam's 'Black Betty' as a theme song is an epic wasted opportunity!"
2 posts
#5
Pain & Anger
: "Realizing that saying “No” is a superpower changed how I handle stress."
1 post
#6
Advice Requests
: "Bra recommendations"
1 post
Popular Topics in r/Lightbulb
#1
Idea
: "Idea: Airports should have prominent signs saying “Congratulations on surviving your drive to the airport. Welcome to a safer form of transportation.”"
90 posts
#2
App
: "A photo App that allows you to take pictures while displaying a translucent overlay of another photo."
33 posts
#3
Ai
21 posts
#4
Movie
: "Horror Movie idea: Jury haunted by victims… who are trying to help the killer."
18 posts
#5
Technology
: "Idea: Airports should have prominent signs saying “Congratulations on surviving your drive to the airport. Welcome to a safer form of transportation.”"
11 posts
#6
Lightbulb
: "Help removing Lightbulb please!"
8 posts
#7
Game
: "Game in which you run a PR agency and you prevent your clients from doing and saying stupid stuff or boost their likeabality"
8 posts
#8
Search
6 posts
#9
Social Media
: "Refreshing my For You Page on Social Media platforms"
5 posts
#10
Drones
: "Drones could be used to build a small package tramway"
5 posts
Member Growth in r/Lightbulb
Yearly
+5k members(4.0%)
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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: June 1, 2026