Started mine on the 31st, same pots-----double the size of yours.
BUT______
Started them in an aerogarden and transplanted most of them after 1st set of true leaves.
Under 6000 (or 6500--don't remember) 6 tube T5HO just a few scant inches above the tops.
And they have a fan on them during light hours, 18/6.
Yours don't look unhappy, and will prolly go nuts when they taste the sun.