Sure, it's not cheap, but IMO ~1$/W plus simple PSU (either some standard voltage, or dimmable current, depending on what you got) for good and 1.5~2$/W for very good CRI is quite fine.
They’re quite expensive compared to normal LED bulbs, but it’s hard to argue against the quality of life improvement, particularly in the winter where I work remotely from a home office all day.
I was actually considering setting up an high brightness array of their full spectrum lighting above my desk. I know the article mentions diffuse lighting is best, but for some odd reason I prefer “spotlight” style. I don’t know why—it just feels cozier to me.
One thing I’ve noticed as I’ve learned more about lighting is that the brighter the light, the better cool color temperatures start to look. For a long time I hated anything above 3000K (too “office-like”) but 4000K actually starts looking pretty good around ~7,000 lumens directly overhead, and I imagine 5000K would look alright above 15,000 lumens or so (perceived brightness is a logarithmic function of luminance). IMO 5000K looks downright ghastly in a home setting for the typical range of 500-800 lumens that most bulbs sell at nowadays.