pamela has brought this to us :
In other words the power consumption of the light saving night light
was greater than one which was on all the time.

I used to work for a certain very large banking chain. As you would
expect they had many offices and call centres for their operation, plus
the many other financial operations they were involved with, with
numerous (thousands of laser printers). Concerned about their power
bills, they commissioned specialists to carry out surveys to find how
they could reduce their consumption effectively.

One suggestion was to install time clocks on all of their thousands of
printers, so they were duly installed, simple cheap electro-mechanical
ones. Like most modern printers, the printers when not in use would go
into low power sleep mode, the sleep mode used much less power than the
clocks, so the net effect was a tiny increase in the bill. Staff would
often work long past normal working hours, only to find they could not
use their printers because of the clocks, the clocks would also
regularly become unplugged and get out of sync with real time. The time
clock plan caused absolute chaos.