alternative
and
background
base
bulb
burgeon
cap
cartoon
clean
compact
computer
conservation
contemporary
ecology
electric
electricity
energy
environment
environmental
equipment
filament
freshness
fuel
generation
glass
glow
green
header
icon
igniting
illuminated
illustration
incandescent
isolated
lamp
leaf
light
lightbulb
lighting
nature
nobody
painting
plant
plantlet
pollution
power
protection
recycling
resourceful
salvage
save
shiny
silver
sprout
symbol
technology
utilization
white