abstract
africa
background
bright
bulb
climate change
compact
concept
conservation
consumption
crisis
dark
dried
efficiency
efficient
electric
electricity
energy
energy efficiency
environment
equipment
ethiopia
fluorescent
fossil fuel
gas
idea
illuminated
illumination
incandescent
industrial
innovation
invention
lamp
land
led
less
light
lightbulb
metaphor
night
nuclear
power
power plants
problem
reduce
save
shine
solution
technology
white