I can't tell on Meonis bike, but on the one shown just above (and on my rally 660 which was ridden in Dakar), they come with 2 independant tail lights made by Acerbis. The two tail lights is a requirement of the ASO for the rally for safety, so I suspect it is what was on Meonis bike as well. They are available just about anywhere.
07 Yamaha R6
07 KTM 950 Super Enduro
04 KTM 250exc- plated two-stroke
01 Kawasaki KE100
74 Honda MR50