blue
bright
city
current
day
distribution
electric
electrical
electricity
energy
engineering
equipment
halogen
illuminate
illumination
industrial
industry
infrastructure
lamp
light
lighten
line
mercury
metal
metallic
object
outdoor
outside
pillar
pole
post
power
resource
road
sky
street
streetlight
structure
supply
technical
technology
transmission
utility
volt
voltage
volts
watt
way
wire