how important are the lights for everyday life?

how important are the lights for everyday life? very important, because the lights really help everyone in doing the job, whether homework, office, workshop, and other .. how about a day without the light from the lights? all will be chaotic and bad for those who really need lighting from lamps. what all activities will all be smooth and okay? no, because for the needy, it is a bad thing and will slow down his work

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