At some Korean car-export terminals and bulk ports, night-time loading and shift changes are intense. Even with fixed lighting, shadows, blind spots and misjudged stair edges frequently contribute to worker trips and minor vehicle collisions. Reflective tape and paint stripes offer little help during power failures or lamp outages.
Port authorities are now using glow in the dark film to create continuous low-level guidance lines and symbol markings along stairs, ramps, warehouse aisles and emergency exits. During the day, these lines function as normal safety markings; when lights are dimmed or fail, the photoluminescent stickers emit their own light, clearly outlining walking paths and vehicle lanes.