1st Space Bucket-Blue Widow (probably)

Tamed this wild beast before switching her to flower today. It's been around 60 days since sprouting and I must know what I'm dealing with! Also, if it doubles or triples in size, I'm worried about my grow light being too close/strong; though they claim the lights are suitable 18-24" I have my reservations. One node on one of the stems has droopy leaves that are curling under and the tips are pointing down (the tips make it look like nitrogen toxicity and not overwatering, though I've been prone to the latter), but none of the rest of the plant seems to have that problem. It's not an end node either, which I worry about being too close to the sides and the reflective mylar. I will be watering without nutrients this week, so after that I will see what happens. Maybe I can just remove the one node if it worsens and the rest stays healthy.