Not sure how I managed to never hit this species with UV. I would describe the colour as a bright, hot, lipstick pink. I am unsure if this lichen is actually fluorescing or if something else to do with how the pigments show up under UV light - maybe @Sal@mander.xyz would know. Picture doesn't quite do it justice.
Another fun thing about this lichen is its role in dying as a photo oxidizing dye (POD). I have not dyed with this specific lichen but I believe the initial colour produced is a nice pink/mauve, when exposed to sunlight the garment will turn a sort of grey-blue colour. Unfortunately, the effect is not reversible so doesn't act as a 'mood-ring sweater'.
Thanks for the idea! That looks very nice, I like how the collection is organized in those storage containers. They look very well preserved so far so your well water + sun protocol seems to be working well. Perhaps I will too start a lichen collection!