October 28, 2025
Blink Wars: Red vs White
Why do some radio towers blink?
Red vs White: Are blinking towers saving pilots or ruining sleep
TLDR: Towers blink to help pilots: white lights by day, red at night, and shorter towers often don’t need any. Commenters battled over safety vs sleep, joked about “sexual dimorphism,” and obsessed over synchronized blinks, with the FAA rulebook link fueling the nerds and RGB meme dreams getting shut down.
The towers are blinking, Dad says it’s for pilots, and the internet immediately turns it into a vibe check. The comment section split into camps: the safety nerds posting receipts and the sleep-deprived neighbors clutching their blackout curtains. One user dropped the official rulebook from the U.S. aviation authority, the FAA, with a link to the full advisory circular on tower lighting here. Another demanded a TLDR: white by day, red by night, because red is less annoying, and towers under 200 feet often don’t need blinking. Cue applause from the “please let me sleep” crowd.
Then it got weirdly delightful. Someone cracked, “That’s some crazy sexual dimorphism,” comparing red vs white towers like they’re birds showing off. Another confessed they get oddly satisfied watching towers blink in sync, speculating they might use a shared time signal (think a radio clock) to stay together—others say it’s often just asynchronous chaos. Meanwhile, the smart-home jokers tried to imagine RGB tower lights tied into Home Assistant, which the FAA would definitely shut down. And in true internet fashion, a commenter derailed the thread with a snarky “muuuuch better article, lol,” linking to Jeff Geerling’s chaos magnet about a “pickle” AM radio tower here. Safety, sleep, and synchronized strobe ASMR—this thread had it all.
Key Points
- •Tower lighting exists to aid pilots and air traffic, using white strobes or red beacons for visibility.
- •The FAA regulates tower lighting, specifying red, white, or dual systems depending on height and location.
- •Legacy white lighting used xenon gas strobes; modern installations commonly use compact white LED assemblies.
- •Red beacon systems often use standard 620-watt incandescent bulbs with dual-bulb redundancy to remain compliant if one fails.
- •Dual lighting systems use white strobes in daytime and red lights at night to reduce disturbance to nearby residents; RGB lighting is not permitted.