Okay so it's not a SF (I don't have a blue filter for my E2e), but a cheapo blue LED. For those of you who are wondering what blood looks like under the blue light here ya go.
I had a bloody nose one day and was trying to get some toilet paper out from under the counter and got a little blood on the cabinet in the process. Well I forgot to clean it off and it soon disappeared (well not really it's just not noticeable under normal light). As you can see the blood is impossible to miss. I was skeptical at first as to how well a blue filter could make the blood more visible, but the picture says it all.
I had a bloody nose one day and was trying to get some toilet paper out from under the counter and got a little blood on the cabinet in the process. Well I forgot to clean it off and it soon disappeared (well not really it's just not noticeable under normal light). As you can see the blood is impossible to miss. I was skeptical at first as to how well a blue filter could make the blood more visible, but the picture says it all.
