When I obtained my Durst S45 it also had an Aristo cold light souurce. I print almost entirely 35mm negatives. I turned the Aristo grid upside down and use it as a lightbox for examing 35mm negatives prior to printing. I examine the entire negative with both a 7x and 30x loupe after loading the carrier. It is a very bright light and allows me to fully examine my negatives prior to printing and get rid of dust etc.