Is warm light the same as a blue light filter?

Similar effect but different implementation. Software blue light filters on tablets reduce blue output digitally. E-reader warm frontlights use physical amber LEDs that genuinely eliminate blue spectrum light.

Can I read in complete darkness with warm light?

Yes, that's the primary use case. Set warmth to maximum and brightness to minimum for the most sleep-friendly reading experience in a dark bedroom.

Best E-Readers with Warm Light 2026