Nov 13, 2021 · Bidirectional Road Stud For Road Safety-Nokin Motorway Road Studs www.rcsolarroadstud.com › bidirectional-led-solarBidirectional Led Solar Road Stud Company-NOKIN Solar Road LED light already lights up at natural light intensity of 150-350 LUX, which makes the SIG 30D Solar Road Studs operate not only at night but also during heavy rain, fog, dusk.