abstract
alternative
banner
bright
brightly
bulb
choice
concepts
conservation
creative
economical
efficiency
electric
electrical
electricity
energy
environment
environmental
environmentalist
equipment
fluorescent
generation
glowing
icon
ideas
illuminated
innovation
inspiration
intelligence
invent
kilowatt
lamp
lightbulb
lit
luminosity
nobody
power
saver
savings
shape
sign
solution
spiral
success
symbol
technology
thinking
white
wisdom