I love the Golden Hi-Flow liquid acrylic paints. I have used the carbon black and the titanium white for years. I recently purchased a set of 10 transparent paints, mostly they are single-pigment. I swatched them for a lightfastness test today on the 18th of October 2023. I also swatched an orange acrylic ink from Daler Rowney that I got as a present from a bestie this fall.
I’ll check in 6 months how they fare in the light.