Reveal spoiler
tip @baah/re-ruslanrumega-2022117t19837232z @ruslanrumega app:peakd message:Російський брехун
It's true, a Candle on a dark night can be spotted from over a mile away by Naked Eye. Russians have Thermal Imaging Systems on Drones and Observers and Recon Snipers with Thermal Scopes with high magnification, so yes, these candels will be easy to spot.
The researchers decided that someone with healthy vision could detect a candle flame from about 1.6 miles away, assuming that there was no fog or other obstructions.
https://www.healthline.com/health/how-far-can-the-human-eye-see#brightness
With binoculars you can see it from about 10 miles.
https://blog.physicsworld.com/2015/08/07/how-far-away-can-you-see-light-from-a-candle/