I would suggest 100 speed film. I shoot a kodak hawkeye brownie on occasion and use 100 speed color negative film and have it developed only at my local lab (these go on to become digital negatives.......). I find that the latitute of color negative film is so huge these days that I can just drop the 100 speed in and shoot regardless of the light. I do the same thing with 400 speed in a holga.