It COULD be the light but I'm not convinced.. droopy leaves like this can also result from over- or under-watering. And some strains just naturally have red leaf stems although this, too, could be a sign of some stress.
Good luck...
@TropicalPeat,yea it is sad to see only Auto fems these days Mr.Nice have so good genetic and on the auction u get them actually for free thats the Genetic material from what all this hybrids come from these days. nice to see another one😊