How to make your arm cannon light up! (the lazy way!)

Ever wanted to make an awesome cosplay but are too lazy to go all out on it? Well have no fear my hatchlings, Samus Aran is here to help! :D I wanted to avoid having to go all out on purchasing LED tape, batteries, and wires while trying to figure out how to make it. :p Watch this video if you want to know how to light up your cosplay arm cannons/gun blasters the lazy way! Here is the link for the LED light I bought:https://www.amazon.com/gp/product/B00L31OTBQ/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1