BTS's official lightstick is called Army Bomb (아미밤).
Version 1
About two years after the debut of BTS, Big Hit Music (formely Big Hit Entertainment) announced the release of the group's fan official lightstick. On March 10, 2015, BTS's official light stick design was unveiled through the group's fan café. Having a translucent, rounded shape, this light stick mimics the pattern of a globe describing how the group has taken over the world with growing international popularity. All members also shared photos of them posing with the lighted light stick.
Version 2
On January 2017, a teaser image was revealed of the second version for the Army Bomb. This second version was released on February 10, 2017 and came with Bluetooth to enable color changes during concerts.
Version 3
On July 5, 2018, a teaser image was revealed of the third version for the Army Bomb. This version was released on July 27, 2018 and it has an official app to switch the light stick to concert and manual mode using Bluetooth.
Map of the Soul Special Edition
This version was released on April 14, 2020 and it has an official app to switch the light stick to concert and manual mode using Bluetooth.
Purple ocean
Purple was given a new meaning by our very own Kim Taehyung on November 13, 2016 during the 3rd Muster following the well-known, and beautiful purple ocean.
First purple ocean
The very first purple ocean was created by ARMYs back in 2016 during 3rd Muster to symbolize a flower path for BTS to walk on. They covered their ARMY Bombs with purple bags (ABs didn't have bluetooth back then), it was really beautiful.
Another purple oceans
Later on ABs had bluetooth which means the color of the AB could be changed through app.
