Sounds like an anti-feature to me; the last thing I want is a light that stays on all night.
What would be nice is a nightlight that can sense when I get out of bed in the middle of the night, and light up in red, so I can walk to the bathroom without running into things, and then turn off again when I get back into bed.
It has no smart anything, it's just a battery powered dimmable lamp with beautiful light.
Comparison with Casper light:
- much cheaper
- has a handle that lets you hang it somewhere
- charges via micro USB
- doesn't have auto-off (will shine all night)