alert
arrow
black
brick
bright
building
closeup
concrete
corridor
danger
dark
direction
directional
door
electric
electrical
emergency
empty
escape
evacuate
evacuation
exit
gate
glowing
guidance
hall
hanging
help
illuminated
indoors
information
instruction
leaving
light
lighted
mounted
night
office
orientation
parking
red
risk
room
route
safe
safety
security
sign
signpost
space
symbol
wall
warning
way