There is a ton of anecdotal evidence on the interwebs about the photosensitivity of fungi, ie, it governs the direction of pin growth, fruit colors, etc. suggesting a circadian rhythm of sorts.

There are older papers out there that do document light sensitivity in the red/blue ranges. However, none that I found have actually documented chemical changes in the fruit itself, just the changes in the structure of the fruit. (If I remember correctly, it was around 100 species that have been documented as photosensitive to some degree.)

I personally have debunked monotub side pinning being caused by light. Compaction of the substrate and limiting moisture exposure to the sides of a mycelium cake has all but eliminated side pinning for me. I digress.

So, I am just looking for new studies and research papers on this subject. Eventually, I will probably conduct my own experiments, but that is for another day.

Cheers!