alternative
bulb
choice
class
classification
concept
conservation
conserve
consuming
consumption
cost
difference
different
ecological
ecology
economy
efficiency
efficient
electric
electricity
energy
environment
equipment
fluorescent
friendly
glowing
green
group
home
household
idea
incandescent
isolated
lamp
lamps
light
lightbulb
lighting
low
lowenergy
luminescent
object
power
protect
protection
save
saving
set
type
white