All 20 leds were functional. Used them to create my own UV flashlight by soldering out old leds and putting in these. The light seems a bit too much in visible waves than the UV should be but still I could use it to read UV ink when I needed.
I'm using UV-light for two different Things. One is to purify water. UV-light kills bacteria's. The water must be in a plastic bottle, not glass, and after some minutes under UV-light it should be clean. This might be different elsewhere, the water here is not so bad. Another use: In my work of I...
I'm using UV-light for two different Things. One is to purify water. UV-light kills bacteria's. The water must be in a plastic bottle, not glass, and after some minutes under UV-light it should be clean. This might be different elsewhere, the water here is not so bad. Another use: In my work of painting T-shirts, I found that fluorescent paint can be nice in normal daylight, but it totally changes colour and brightness in UV-light. So if someone is wearing my work into a discotheque the image will change colours dramatically when they move around, in and out of the "Blacklight". To test this effect I have bought some of these, and also some flashlights with the same LED's. I saw one her commented on testing of money, these work fine, if the money is real, there should be some sparkling colours there. Technical: To figure out the right Voltage, I have done some experiments, and it seems to be 3,9Volt that is right. I have been searching for technical data for these LED's, but found nothing. 3.6Volt is too low, so maybe 4Volt is what they are made for. Anyone else with an opinion out there?
This Leds are very nice because there are so BRIGHT! BRIGHT as HELL :D !
You can use those for a lamp or for some DIY. BE AWARE TO USE ALL UV LEDS WITH TRANSISTORS OR YOU CAN BURN THEM!!!
You should also check on the internet for the optimal voltage of UV LEDs before crafting something ;)
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