USB powered "busy light?"

I saw this product today but can't justify $40 a pop for them. http://ift.tt/10xIsgV

It's a usb powered light designed for open floor plan offices that works with an app to indicate whether you are busy or available.

What would you recommend for making a similar device that also has the light enclosure (to diffuse the light so it's not just a plain LED blinding you)? It doesn't have to have colors or work with an app, but just an on/off toggle for the red light would be great.

Thanks!

Submitted January 31, 2015 at 07:52AM by Makan_Lagi http://ift.tt/1uKIOeW