bane

bright

broken

bulb

clipping

compact

concepts

conservation

cutout

danger

dark

eco

ecology

economic

economy

efficiency

efficient

electric

electricity

energy

environmental

flash

fluorescent

glow

green

idea

illuminated

innovation

isolated

lamp

light

lightbulb

line

modern

money

object

old

phosphor

pin

power

quicksilver

recycled

save

saver

savings

shine

technology

tube

watt

white