Luxi is a light meter attachment for the iPhone that you can use to test and tweak light settings before taking pictures with a camera. This is a patent-pending product from Extrasensory Devices. It won’t empower you with ESP, but you will have the power to use the best light to bring out vivid colors and clarity in your pictures. Luxi is basically a diffusion dome that fits in snugly over your iPhone’s front-facing camera. It comes with a free light meter app that you can find in the App Store. It’s especially useful for professional shutterbugs who need to take perfectly exposed pictures for publication or events. Why buy and carry an expensive light meter when Luxi will do the job perfectly and determine the optimal light settings in combination with your iPhone.