Beginning in 1926 Dell sketched lights, at first for the New Frankfurt-project. As an early industrial designer and pioneer of plastic design, Dell used bakelite and aminoplastics as materials for his works for Molitor-Zweckleuchten in 1929-30. Well known are the lights for the lamp factory Gebr. Kaiser &amp; Co. in Neheim Hüsten beginning in 1933-34, which were produced in large quantities.