Nov 26, 2021 · The solar road stud NK-RS-A7 can also be used in special road sections. For example, in the dark tunnel, when the illumination is reduced by 50% or the power is cut off, solar road stud NK-RS-A7 can also maintain the omni-directional reflective effect, reminding the driver to drive carefully. Solar Led Road Stud With Al Material In Durban-LED Road Studs