It was found that painting the inside of a Source Four Jr or Source Four 5 and 10 degree lens tubes black was unnecessary to maintain light output and quality. A blind comparison between several options including black, grey/aluminum, all white, and partially white tubes was conducted. Both 19 and 36 degree tubes were tested as well. What was found is that it is possible to mask the inside of the tube up to the 26 degree lens slot and leave that area free of paint while the rest of the tube is painted white. We will also be able to do this with custom paint colors as well.
Please see the illustration of the area that will remain bare metal on the white and custom color tubes.
SEE ATTACHMENT: Illustration