Derwent Lightfast colored pencils are great for professional artists as they are 100% lightfast (under museum conditions). They blend well, the colors are vibrant and the build quality is very good. The only thing I don't like is that you can't draw with lighter colors onto darker colors.
Review: Derwent Coloursoft
Drawing Drawing
Fueled by Clouds & Coffee: Product Review: Derwent Lightfast Colored Pencils
100% LIGHFAST – Revolutionary oil-based core creates rich, vibrant color. 100% lightfast, all colors are professional quality and comply with ASTM
Derwent Lightfast Colored Pencils 36 Tin, Set of 36, 4mm Wide Core, 100% Lightfast, Oil-based, Premium Core, Creamy, Ideal for Drawing, Coloring
I Tested Every Colored Pencil to Find the BEST ONE! - Sarah Renae Clark - Coloring Book Artist and Designer
Introducing NEW Derwent Chromaflow Coloured Pencils
Derwent Lightfast Pencils Review - The Artistic Gnome Blog
Reviews Sketchblog of Nela Dunato - Cwtam
Pencil paradise: top 10 review of the best colored pencils
Chromaflow Review – The Colouring Times
10 Best Colored Pencils For Artists In 2023