The article:
http://www.michaelandpaula.com/mp/devinsp.html
A red safelight definitely will fog less exposed areas of film regardless of development time. I use a few seconds of exposure for Sabattier film reversal after development in Dektol.
The green safelight used for development by inspection is very dim and the wavelength was chosen to correspond to the eye's region of maximum sensitivity. I'd suggest using the recommended light, distance and time, and running tests.
For instance, carefully expose a few sheets of film, and develop one perfectly by time and temperature. Develop another for 50% or 75% of that time, and 100% of that time, placing them in an acid stop bath. Examine the two stopped and unfixed negatives under the green light for a second at 3 or 4 feet distance so you'll know what the endpoint looks like. Develop the 50% or 75% negative for the remaining 50% or 25% of the time, stop, and fix that negative and the 100% negative that's been in the stop bath. Compare the unexposed/shadow areas for fogging.
EMULSION DOWN when shuffling!
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