Just as an aside on flashlights, I used to keep a set of flashlights in my DR at Kodak, with filter sets for ortho, pan and min-pan as well as color. We got them from our stockroom. Some had snoods on them for directional work. So, what is the problem with flashlights in the DR?

It is necessary to have air! Flashlights as safelights are a luxury item but doable.