英文關鍵字
alternative
background
built
bulb
concept
conservation
consumption
ecology
electricity
energy
environment
environmental
filament
future
global
green
idea
innovation
invention
lamp
led
light
lightbulb
motion
object
off
old
power
process
protect
recycle
renewable
resource
retro
saving
slow
style
symbol
technological
technology
tint
turn
vintage
warm
yellow