The lens is made from polycarbonates.
PC is the best light transmission material in engineering plastic.
Strength and toughness also is very good so under pressure and drub it will keep intact.
It is Ideal for mounting on barricades, and water filled barrier for marking roadways, dangerous areas or construction site area.
Don’t have to open the switch again and again in the outer suburbs and dangerous construction site. It is safer and energy saving.
At the edge of lens is 1cm reflector. When light shoot, it will reflect brighter light to show the warning sign for driver in darkness.