Seedlings in solo cups

Just wondering how long you guys keep your seedlings in solo cups.
I have some almost 2 weeks old and on their 4th set of leaves. How big should they be before I transplant?

Usually no more than 3 weeks for mine.

How many sets of leaves do you usually have by then? I'm on my second grow and my nodes are pretty close this time. Last time I didn't have enough light and they were tall and scraggly. This time i upped the light and now there short and bushy.

depends on strain but after 2 or 3 weeks you'll want to transplant.

Just some bag seed off some decent bud. I fucked up my lights last time and they produced naners late in flower giving me about a dozen seeds from 2 plants. Light leak is fixed for this round tho. So far so good. Lookin way better than the first round.