FirePak Smartphone Video Illuminator
Here is another handy tool that lets you capture clearer video with your smartphone in low light conditions. The FirePak Smartphone Video Illuminator has two bright LEDs with reflectors to perfectly light your videos. FirePak has 4 lighting levels. You can attach it to top smartphones thanks to its rails.
FirePak is compatible with iOS and Android devices. It has a port to charge your smartphone too. More info is available here.