I had the idea to measure the brightness with a photo exposimeter (Sekonic L-308S), and found the following results:
Boyue T62+
Maximum: 11 EV (5120 Lux)
Minimum: 7 EV (320 Lux)
Boox N96ML
Maximum: 6 EV (160 Lux)
Minimum: 3 EV (30 Lux)
To put into perspective these data, let's consider a simple list from
this page:
Condition — Illumination (Lux)
Sunlight — 107,527
Full Daylight — 10,752.7
Overcast Day — 1,075.3
Very Dark Day — 107.53
Twilight — 10.75
Deep Twilight — 1.08
Full Moon — .108
Quarter Moon — .0108
Starlight — .0011
Overcast Night — .0001
These are some common indoor light levels (in lux):
Warehouses, Homes, Theaters, Archives — 150
Easy Office Work, Classes — 250
Normal Office Work, PC Work, Study Library, Groceries, Show Rooms, Laboratories — 500
Supermarkets, Mechanical Workshops, Office Landscapes — 750
Normal Drawing Work, Detailed Mechanical Workshops, Operation Theatres — 1,000
Detailed Drawing Work, Very Detailed Mechanical Works — 1,500 - 2,000
Conclusions
As many have reported, the maximum brightness of the Boyue T62+ goes far beyond what is needed to read comfortably. About 1/2 of the brightness would be more than enough.
On the other hand, the Boox N96ML lags way behind in this regard. Without ambient light, it would be almost like reading in a very dark day, or in a theater. Is it possible? No doubt. But it will be rapidly tiresome. A word of advice: in this case, don't depend exclusively on the light of the device.
[I will pin it to the first post as well]