Using an iPad as a Key Light.

 
Rodney Charters, Drew Gardner and Lan Bui playing with the new Canon EOS C300 camera. To test the camera’s 20,000 ISO capability, they shot a low-light scene using an iPad for the key light and an iPhone for the fill light. This is way too cool.

Test Technical Notes:
Camera: Canon C300
ISO: 20,000
Lens: Canon 100mm f/2.8 IS L lens
Aperture: f/2.8
Shutter: 1/25th (360 degree)
Canon Log Gamma