Your smartphone is already capable of capturing amazing photos. For proper lighting, you can always use the Manfrotto Lumimuse 8 Bluetooth Light. It comes with 8 LED and 4 step dimming. With tungsten and diffusion filters, you get the effect that you need for every shot.
This on-camera light comes with a shoe mount. The internal battery lasts for up to 60 minutes. You can always get more filters to do more with these lights.[where to find it]