On occasion I use this Kodak Brownie Flash Six-20 (circa 1947) camera. It's fitted with a Twindar lens and a No. 2 hood. For close in snaps a No. 7A portrait lens is attached using 11 or 40 bulbs draped with a white handkerchief. For a big blitz it's a 2 or 22 bulb. To date I've been using Lucky and Shanghai 100 speed 120 film re-spooled on 620 spools. Negatives develop well in Rodinal 1:50.
It's all just a matter of convenience.