Bought two of these LED bubs. They run off usb connection to power. ( plug into rechargeable power brick)
https://www.amazon.com/gp/product/B00QX096L0/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B00QX096L0/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1