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a businessman holding a light bulb in his hand thoughtfully
bulb
bulbs
businessman
businessmen
electricity
energy
glass bulb
glass bulbs
good idea
good ideas
hardware
home electricity
household
household item
idea
ideas
light
light bulb
light bulbs
lightbulb
lightbulbs
lighting
lights
man
men
object
objects
people
person
power
thing
things
think
thinking
thoughtful
thoughtfully