background
bright
brightly
bulb
choice
clean
clothing
color
compact
conservation
copy
economical
efficiency
electricity
energy
environment
environmental
environmentally
equipment
fluorescent
fragility
fuel
generation
glass
glowing
household
ideas
illuminated
inspiration
kilowatt
lamp
light
lightbulb
lighting
lit
luminosity
power
preserved
saver
saving
savings
screw
single
space
sparse
twisted
vibrant
white