blue

cable

cloud

communication

construction

danger

dawn

distribution

electric

electrical

electricity

energetic

energy

engineering

equipment

frame

glow

grid

high

horizontal

illuminated

industrial

industry

light

line

metal

peaceful

pillar

pole

pollution

post

power

pylon

sky

station

steel

structure

sunlight

supply

tall

technology

tension

tower

transmission

utilities

volt

voltage

watt

wire