Looks like very mild stress, nothing serious. The yellow tips and slight curl are usually from light being a bit strong or nutrients being right at the limit—especially since you’ve been watering more. You already did the right thing by raising the lights 👍
I’d just hold steady for a few days, don’t increase feed, and watch the new growth. If it stays green and flat, you’re good. This is a “back off just a touch” situation, not a problem.
Hope that helps, good luck! 😘