lightbulb idea engraved hand drawn old sketch and vintage symbols back school elements |
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| navigate by keyword : abstract art background brainstorm bright bulb business concept creative creativity design drawing education efficient electric electrical electricity element energy equipment flat fluorescent glass glowing graphic icon idea illumination illustration imagination innovation inspiration invention isolated lamp light lightbulb logo outline power set sign simple solution symbol technology thinking vector white |
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| Lightbulb or idea. engraved hand drawn in old sketch and vintage symbols. Back to School Elements |
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