They both look good, some yellow/dead leaves on both, my guess is the 1k hps has a high heat out put and the plant is just reacting to that. more transpiring, more heat on leaves, using up more nutes, using more CO2.
No problem with either... so no worries.
As waiting for nature to remove your leaves...aint never gonna happen indoors. outside there's rain and gust of wind...indoors nada...
You should remove any sickly or dead leaves, allows better light penetration and air flow.
I prefer the yellowing, it shows that the plant has used up available nutes and has to leach it from the leaves, ensuring a cleaner smoke.
All in all...good girls...lol