Thank you for the responses.

K def? Bloody hell, it is hard to tell what they want sometimes, isn't it?

I gave them a good watering today at 6.6-6.7 pH and the run-off was right near there (6.7-6.8). Next watering is supposed to be their nute watering. Since they don't look nute-burned I'm not worried about doing that, but it is disconcerting to see something not quite right with them and being unclear on what that is.

Weedhound: I water them in the bathtub and collect the runoff from their trays and dump it before I put them back in the cabinet. No wet feet for my kids.

I was shocked to see that there are already roots poking out the bottom of the drain holes. Whoever said HPS was not as efficient at promoting root growth had to be kidding. I will be potting them up next week or perhaps even this weekend because I am running out of room and need to flower them very soon.

Giving nutes with a re-potting is OK I presume? Also, if I understand correctly it is better to have them in their larger pots for about a week before putting them on 12/12, correct?