Invision, Trout-
Those pics are the best examples of thrip damage I've seen posted. You can clearly see the short, silvery, glossy 'trails' that their larvae leave as they munch.
Thrips generally also attach the plant from the base up, so damage to the lower leaves appears first, while mites love the heat from the gorw lights and will happily chow down at the top of the plant.
DutchLover, welcome to the world of fighting thrips!!!
-Double-sided tape around the base of the stem to keep more larvae from climbing up
-REgular neem treatment
-Bugbomb if you care to go that route
-Sticky traps LOW DOWN in your garden to catch any stray adults flying around.