Smartphone cameras are getting better in low light conditions. You are still going to need ample lighting to capture crisp video. The Iwata GL-01 is a portable video light with temperature range of 3000K-5500K that you can take anywhere to light your subject. It runs on a 2300mAh battery that lasts for up to 18 hours depending on brightness level.
The Iwata Genius Light has a 1/4 screw hole, so you can attach it to your selfie stick easily. It uses 117 LED bulbs to light your subject. You can order yours for under $80.[where to get it]
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