Luxi is a diffusion dome accessory that aims to turns your smartphone into an affordable incident light meter. The accessory is currently gaining traction via a Kickstarter campaign, is designed to work as an incident light meter by measuring the light for an entire scene, rather than just reflected light. Luxi is expected to retail for $ 24.95, and its developers claim the accessory will work with existing light meter apps. See the Luxi in action at connect.dpreview.com.
News: Digital Photography Review (dpreview.com)