Id say u haven't really got anything to worry about I've Just finished 2xnorthen light autos and to look at side by side u would say different strains...I was on the worry until I seen pics of other people's n.lights and realised each were different in their own rights...so Imo genetics but document everything down so if u hit a problem on future grows u have ur note book to look back at good luck Craghodgy 💨