Light distance for this stage

With 2 TSL 2000s, your plants should be about 26" away would be my estimate (hard to calculate for 2 lights). Any closer will stunt them. Any higher will cause stretching, which is no good either. Seems like a good idea, you want nice tall plants. The plants, however, need to work on things other than height. You don't want them redirecting energy to be tall and lanky. It's definitely time to get them put of the solo cups though. They are probably rootbpund right now, which will cause all sorts of issues.

Maintain about a 2 foot distance for most lights. Some leds are too bright and need more distance. When flowering you can get a little closer like 18 to 20 inches. Stretching don't really start good till flowering starts. Good luck and happy growing 🌲🌲🌲👊

I would! Seedlings need like 25 inches away—- not just to stretch, but to keep them away from the heat.