I'm usually on Cigarbum at night, most, nights,most all night, most nights.
Best to play it safe, protect cigars from all light. Stick to use of lighters that emit no light.
Avoid shiny or reflective surfaces to avoid light from the burning end of the cigar being bounced back and potentially damaging the cigar as you smoke.
Moonlight can really b a problem since you're risking exposure to reflected Sunlight.
It sould not be need to be said.. But Sunlight is extremely damaging to Cigas as it is to Humans, even Cigarbums.
Do hope this helps, without of course casting any light on the subject.