I’ve found that using an adjustable sat nav holder AND an iPhone as a light source make a great combination for close up lighting or medium fill.
The suction mount from the sat nav stand will stick to most flat surfaces and the articulated arm means you can position the light exactly where you need it.
The photo examples attached were on a video shoot and I had no problem balancing the power of the iPhone with my LED video lights.
The close up photograph was lit with just an iPhone!!