Unless the LEDs come with a safety warning, I would doubt that the UV light is U enough. The tubes generally used for erasing EEPROMs are somewhat dangerous to humans. I'd guess that UV LEDs are more similar to the so-called 'black light' units which used to popular at discos(may still be popular for all I know[or care]).
:idea: Do a comparison of the wavelengths of normal tubes and the UV Led, if there close-ish? it should work.
The Leds higher focusing may actually be better?? I'm interested in this application too Let us know if it works?
Edit## Checkout this Link >> https://optics.org/articles/news/9/11/14/1 @wavelengths of 290nm and 275nm, this should be possible. Although lower watts, its concentration on a pic/eprom die should blast it
I looked into trying this with "super bright" high output LEDs several months ago. The lowest wavelength LEDs I could find were around 400-405nm,
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and most blue LEDs fall in the 470nm range
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My old Intel databooks recommend exposure to UV light of 2537 Angstoms (254 nm) for erasure, and the only thing that comes close are UV lamps like the G4T5.