what is low light noise?

in the film days, we used the term 'grain' when shooting with high ISO/ASA film.  Digital photographers call it 'noise'.  If you are taking pics in low light, depending on your ISO setting and camera quality, the pics may appear to be 'grainy'

Are you having issues with this?

ok thanks for the answer now I know. also I haven't tried any low light with this drone but the phantom 3 standard had major issues with this. its just too cold out to fly for long here.