The ESP Barrel bobbin lunatope set consists of 2 rings and 1 lunatope for the esp barrel, Set is suitable for 1 bobbin in the colour blue or green.
Lunatopes are made of a unique mix of materials, which cause the lunatopes to glow. A few seconds of light from the sun or another light source - like your headlamp - will bring them back to maximum brightness for another session!
Lunatopes are not comparable in brightness, if you look at the isotopes and betalights they can replace. Your equipment will be bright and visible during the dark evenings and nights.