environmental
activate
background
brown
button
cable
closeup
color
connect
connection
conservation
conserve
cord
current
danger
domestic
double
electric
electrical
electricity
empty
energy
equipment
fixture
horizontal
house
image
indoor
insert
interior
isolated
knob
light
line
nobody
object
outlet
plastic
plug
position
power
press
socket
space
supply
switch
technology
wall
white
wire