alert
area
available
background
bar
building
bulb
car
ceiling
control
dark
detector
device
digital
electronic
empty
equipment
garage
green
illuminated
indicator
indoors
infrared
interior
led
light
lot
metal
monitor
object
parking
round
sensor
sensors
shape
sign
signal
smart
space
steel
support
system
technical
technology
tool
top
unoccupied
vacant
white