When HN users recommended it
1 HN user recommended this in 2023, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2023, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
I learned last night that there are low-cost cards that test for UVC exposure; here is an example:
https://www.amazon.com/QuantaDose-Light-Power-Visibility-Tec...
They are usually used to verify that a purported UVC lamp is working, rather than working as a measure of protecting your eyesight, but maybe I should start bringing one of these to any concerts I go to.