I have some new Kodak safelight filters that I want to use with my red LED safelight (for extra protection with VC enlarging paper and slow ortho films).
I think most people would use the #1 but I've never been quite clear on the following. The #2 is not just a more dense version of the #1. It also absorbs light further into the red spectrum (ie cuts off at higher wavelengths). So assuming I want a given level of illumination, instead of using nthe #1 filter why not use the #2 filter and put more wattage through it? Given the spectral characteristics of the #2 filter shouldn't I be able to put a lot of light through it and therefore light my darkroom with a relatively bright, but safer spectrum? Or should I just use the #1 with less power? To me, logically, putting more light through the #2 filter would be better for good brightness and longer safe times. Not sure though.