Uploaded August 2015 | Updated September 2026, 10 hours ago
Credit to: youtube.com/watch?v=NfBWQQU9HI8
Improvised pseudo UV light filter. I used a clear plastic bag from a cheap wall adapter power supply and used masking tape around the edges to hold it with my hand over a powerful LED flashlight.
One of these is a highlighter, the other is a yellow marker. I switched the caps for contrast.
Sharpie marker on the clear tape or clear plastic with 1 layer of Purple, then a layer of Blue, then Purple again.
Credit to: youtube.com/watch?v=NfBWQQU9HI8
Improvised pseudo UV light filter. I used a clear plastic bag from a cheap wall adapter power supply and used masking tape around the edges to hold it with my hand over a powerful LED flashlight.
One of these is a highlighter, the other is a yellow marker. I switched the caps for contrast.
Sharpie marker on the clear tape or clear plastic with 1 layer of Purple, then a layer of Blue, then Purple again.








