Finally, Mark Zuckerberg invented something for the common good. Even more impressive, he gave it away to someone else to be developed – and it’s raising money like gangbusters on Kickstarter.

It all came out of a sleep hack he built for his wife, Priscilla. Last April, he created a wooden box that sat on the bedside table and glowed a soft light between 6 and 7 am – right before Priscilla had to get up and wake the kids. Previously, Zuckerberg wrote on Instagram in April “She’ll wake up and check the time on her phone to see if the kids might wake up soon, but then knowing the time stresses her out and she can’t fall back asleep.” The Sleep Box, as Zuckerberg called it, didn’t stress her out by telling her the exact time.

Zuck announced that he’d give the idea away, since there seemed to be some clamor for it: “a bunch” of his friends wanted one, too. He posted it to Facebook, saying he’d be fine with another techie taking the idea and running with it.

That’s what developer Greg Hovannisyan, who does not know Mark Zuckerberg, did. After building a prototype he launched the “Zucklight” on crowdfunding site Kickstarter in June with a goal of $5,000. Now, it’s at $188,116, with the funding period ending on August 12th.

While there’s the original basic Zucklight, more bells-and-whistles versions are available higher cost. The Zucklight Plus lets you charge your wireless device with a built-in charging pad. The Zucklight Pro is serious, with sensors that track a room’s carbon dioxide levels, as well as humidity and temperature.

Courtesy Zucklight

Here’s the finished Zucklight. You can pre-order the most basic version on Kickstarter for $34.