How bright is bright enough for a bedside smart lamp?

Reviewers generally consider 400–800 lumens adequate for ambient bedside use, and 1000+ lumens for reading. The Verge noted the Govee cordless puts out about 500 lumens vs roughly 370 from the comparable Hue, while r/Hue threads repeatedly flag that the Signe and Iris are great for mood lighting but too diffuse to read under.