I notice a project on kickstart, but it's just very simple, don't know why there could be so much backers. And $15 is not cheap, in china there are similar product on market years ago, which cost no more than $1, only the color is not controlled by mobile app, it automatic change the color by timer.
https://www.kickstarter.com/projects/mi ... ef=popularReally strange, does it because of the difference of countries?