On Tuesday, 20 October 2020 12:45:04 UTC+1, George Miles wrote:
I have several emergency lights over the stairs etc, which
light up when the mains fails.
But if they only last 4 hours, and the power trips when i'm
asleep at midnight, and fire breaks out at 6 a.m. or i need
to get up, they will be flat.
So recommendations for emergency lights with longer lasting
batteries please?

You could just double up the nicad batteries in the LED ones.

Or fit a buzzer so that if the power goes off during the night you get woken up and can stay awake for the rest of the night.

Or fit one with a DP relay to the smoke detector so the mains is removed AND the LEDs are connected ONLY during a fire alarm.

Owain