Are cheap UV detection cards any good?

How do you spot ultraviolet light? A cheap way is UV indication cards but is a cheap way a good way? In this video, I test three different indicators with six different lights. I also show how it is possible to use the cards to test if your glasses have UV protection. Including potential misreads depending on the light source used. My Patreon-page: https://www.patreon.com/Brainiac75 More about amber search lights: https://youtu.be/gNJAHwJwPLc More about the 3W GTL3 UVC lamp: https://youtu.be/bb4t1F88mHs Did you miss one of my videos?: https://www.youtube.com/user/brainiac75/videos FULL MUSIC CREDITS Time codes: 0:01 + 10:06 "Long Note Three" Kevin MacLeod (incompetech.com) ISRC: USUAN1100424 Time code: 0:51 "Lightless Dawn" Kevin MacLeod (incompetech.com) ISRC: USUAN1100655 Time code: 4:55 "Neo Western" Kevin MacLeod (incompetech.com) ISRC: USUAN1100615 Time codes: 5:53 "Perspectives" Kevin MacLeod (incompetech.com) ISRC: USUAN1300027 Time code: 7:46 "Energizing" Kevin MacLeod (incompetech.com) ISRC: USUAN1900040 All music above licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/ Time code: 7:16 Mix of two tracks: 1) The Shimmering by fran_ky (freesound.org/s/237363) Licensed under Creative Commons 0 license 2) "Spacial Harvest" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/ ISRC: USUAN1100653 #UVdetection #UVprotection