abstract

addiction

background

bright

business

carefully

communication

concept

conceptual

danger

dark

design

direction

display

emergency

entrance

escape

evacuate

evacuation

exit

fire

gate

guidance

guide

help

icon

illuminated

indication

indicator

info

information

isolated

light

lights

neon

night

nobody

prohibited

red

safety

security

service

shiny

sign

solution

stop

style

symbol

warning