r/pseudolithos

Got it from Etsy about 2 years ago.

I’ve bought a few of these, but the darken over time. Can I get some advise on lighting? I got these guys. In the order I’ve numbered them above. I got three and four at the same time. I got 3 and 4 at the same time, #3 was a little darker when I got it. Three and four have not darkened at all. These are in a lower light area. I keep as a kind of hospital area for New and delicate cacti.