For all entries (#19, #18, #20): we prefer a darker blue and a bolder font for lightS. Please notice that the brand is dmlights and not dmlight. Entry #19, arch idea is not bad, but should be more subtle. We prefer a symbol that can be put on its own. That’s not so obvious with this one. #20 the symbol refers more to a sunset more than to design lighting. Entry #21: symbol is way too big, but the idea is not bad. Maybe try to put this idea in a square-form?