abstract
alternative
background
blue
bright
brightly
bulb
concepts
conservation
creativity
ecologically
economical
efficiency
electric
electrical
electricity
energiesparlampe
energy
environment
environmental
environmentally
equipment
fluorescent
glass
glowing
green
halogen
horizontal
illuminated
innovation
lamp
light
lightbulb
lighting
lit
nobody
object
objects equipment
power
saving
savings
shiny
sparse
supply
symbol
symbols metaphors
technology
vintage
white
yellow
定額
energy saving light bulb at blur backgroundの素材 [FY31018583357]
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![Bright background colorful letters children's English alphabetの素材 [FY310197057726]](https://images.assetsdelivery.com/compings_v2/freeman83/freeman832301/freeman83230100235.jpg "Bright background colorful letters children's English alphabetの素材 [FY310197057726]")