Hi, coming to this late! I've missed a lot of stuff during eye surgery and recovery and such.

I presume I do not need to tell you about Colour Rendering Index data for light sources.

I personally find that I do better reflecting light around as much as possible for general tasks. That's the most like outdoors, for me, anyway.

For specialised tasks, I find I do better with flexible lamp placement. To wit: have you considered a sturdy rail going 'round the room, to which you can attach movable clamp lights with flexible necks? I use them when lighting the studio for webcasts, things like that. I also used them when I had my own art studio.

Separately, I'm sending you some email at the email address listed on your art site.