you don't want to use a red safelight with pan film, it will fog the film
you want to use a dark green safelight to check for highlight density
there is information about dbi / developing by inspection here: http://michaelandpaula.com/mp/devinsp.html
it takes a little practice ... i wouldn't leave the light on for a prolonged length of time,
you will risk fogging your film with the green light too
good luck !