Seems like both lights cost $37 each.
You can buy 18650 or16340 tube for $8 free shipping.
All I can say it's cheap compared the the Sunwayman C10r and C20C
GF1 18650 version Size: 111mm*25mm(head diameter) 74g
C20C 105mm x 25mm (head diameter) x 24mm (tail diameter) 57g
GF1 16340 78mm*25mm(head diameter) 61g
C10R 82mm X 25(Head daimeter) 63g