Thank you all very much. That was extremely useful info. I thought I had read where Thomas safelights are very safe w/ B&W, & that some LED are barley save w/ color materials. Of course I would correctly test any combination of materials & darkrooms for light safety before use. I now know how to properly test for light safety. You don't just lay a quarter on an unexposed sheet of paper for a half an hour or so, & think it's just fine if the coin doesn't show up, as I did as a teenager. I am just blown away by being able to use any light when color material is out. Even as my skills increased working in total darkness, odd mishaps would occur where a small amount of light would be a God send to get out of a jam.
Thank you, Jay Drew