More than 70 innovators huddled into Somerville’s Greentown Labs last weekend in hopes of hacking their way to solutions for some of the biggest sustainability problems facing the world today. The fourth annual Cleanweb Hackathon brought together 10 teams for a 30-hour sprint to producing an app or other technology that supports clean and sustainable practices.

After a long day and a half toiling away, it was Team LightsOut (as seen above) that took home the ‘Best in Show’ accolade.

The app, coined LightsOut, that enables people to photograph and geotag energy efficiencies, like lights that are left on during the day, in an effort to drive a conversation around how to better conserve energy. The champs took home a whopping $5,000 in prize money, as well as free entry into CleanTech Open, a startup accelerator with a similar mission to the hackathon at which the team can take their idea to the next level. 

“It was inspiring to see how much each team accomplished in just one weekend of work. The LightsOut team is thrilled to have received the top prize amid such stiff competition, and we are excited to advance the project in the coming months,” said Spencer Lawrence, a member of team LightsOut, in a statement. The winning team also included John Massie, Nathan Tarpey and Braden Lawrence.

Team MapMyEnergy landed the second place spot with its creation of an app that sorts through and organizes real estate listings by energy efficiency. Judges were stuck in a two-way tie for the third place winner, so the award went to both Team Barnacle, whose hardware and software project allows homeowners to use their phones to control the water flow to their house, and Team TravelGreen, whose iPhone app helps users travel more efficiently and cleanly. Lastly, it was Team Greenbean that would the audience vote with its smart recycling bin. 

LightsOut, along with most of the other hackathon teams, registered up for the Cleanweb Hackathon DataJam, a two-month mini-accelerator during which teams will continue to develop their projects spun at last weekend’s event while learning what it takes to start a full-fledged company.

Congrats to the Cleanweb winners and participating teams!

 All images via MassCEC