The election shall be called by posting notice thereof in three public places in the proposed lighting district, and by publishing the notice in a daily or weekly newspaper, published and circulated in the district, if there is one, at least once a week for not less than 15 days. The notices shall specify the time, place and purposes of the election, give the boundaries of the proposed lighting district, and the hours during which the polls will be kept open. The polls shall be open the same hours as provided at general elections.