I bought these super cheap ones and its amazing!
https://www.amazon.com/gp/product/B018073GEQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8
Try these as tail lights! Super cheap and bright
https://www.amazon.com/gp/product/B018073GEQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8