On city day, cities buy fireworks, drones, artists. Budgets are large, but fireworks are often banned, drones depend on weather and are expensive.
Problem-free alternative
Viewers on the square raise their phones, and the entire square becomes part of the light show. Ultrasound synchronization from the stage, works in any weather.
No permits, no cleanup, no cancellation due to wind. Effect on the entire square, from small to large.
After the show a promo and draw open in the browser. The city gets viral content from participants.
More about the format in the Concerts and festivals section. Drone alternative in a separate article.
How cities choose the program
Procurement for City Day and city festivals goes through contractors and agencies. Dates are predictable: 12 June, city founding day, summer festivals. Budgets are allocated in advance, priority is safe and mass formats without long preparation.
Comparison of options
- Fireworks: bans on public grounds, neighbour complaints, fire safety, cleanup
- Drones: price from hundreds of thousands, wind and rain cancel, flight and site permits
- Artists: viewers watch but do not participate, effect only on stage
- Flashlights: the whole square participates, any weather, no permits or cleanup
How it works on the square
The stage screen shows a QR code. Sound from the square’s speakers carries the ultrasound signal. Viewers raise their phones and the entire square forms one light picture. Scale from a small park to the main square: the mechanic is the same, the area adapts to the number of people.
Preparation 1–2 weeks. From the administration or agency you need: a screen or projection with the QR, sound across the square, script coordination with the host. We handle everything else.
The city gets ready viral content: guests film the light on the square themselves and post it. This is free advertising for the event on social media. The format requires no pyrotechnicians and no cleanup afterwards.
Works in any weather and lighting. On an open square the effect is visible even in daylight. Suitable for cities from 10 thousand to millions of residents, the mechanic scales.
