Hey all,
Quick update on safe lights, in most cases it is a thing of the past.
Why?
Old style light bulbs (not that old for some on here) incandescent or florescent have our light in a very broad spectrum. Not exact but from around 300-700 NM. Emulsion is sensitive to light from 280-420 NM maybe a little higher. The light NM range that emulsion is sensitive to is not visible hence would make a poor choice for lighting applications.
Hence?
LED tubes, lights used for visible light application would not emit light in the 300-420 as it would be a waste of energy (it is not visible) so it is not necessary to use a filter to filter out wave lengths between 300-420 since there isn’t anything there anyway or such a small amount it is irrelevant.
When buying new LED tubes?
Look at the spectrum of light and make sure 300-420 NM is not present and you will be good to go