Hi
@SleepyBrown! You're having invaders, it looks like thrip's marks. Those tiny bugs hide onto & below the leaves and suck the nutrients out of our plants, hurting the leaves and slowing down the plant's development if the invasion is massive. They tend to multiply very quickly in hot weather, they hate wind, and moreover they get sterile and die with Neem Oil. So I'd recommend to get some neem oil asap, mix 12-15 drops of pure neem oil in a liter of water, and spray onto your babies at night, when the lights are off. If they're still there after a few days and a few sprayings, you might consider increasing the neem oil doses, or add some soap in your spray for the oil to stick onto the leaves. Keep a good airflow and a slight continuous breeze onto your plant's canopy, this will disturb them and prevent the invasion to spread everywhere. Hope this will help, keep us up-to-date and happy growing 👊