Light bulb in hand
Schlüsselwörter
bulb,
efficiency,
electric,
electricity,
energy,
environment,
european,
expensive,
finger,
glasses,
hand,
human,
idea,
invention,
lamp,
light,
light bulb,
1,
palm,
power,
save,
smart,
solution,
solve,
spiral,
technology,
thinks,
watt
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