background
black
blue
cables
clouds
conductor
dangerous
dusk
energy
engineering
environment
equipment
factory
frame
green
grid
high
horizon
industrial
industry
infrastructure
insulation
landscape
light
line
metal
network
orange
outdoors
plant
power
pylon
red
silhouette
sky
structure
substation
sun
sunrise
sunset
supply
technology
tension
tower
transformer
tree
voltage
watt
wire
yellow