sorry I didnt get back to you in time,
fully established secondary growth IMO is when the secondary growth (growth between the nodes and fan leaves) is at least as long as the fan leaves. That way you wont be blocking any light to those branches. This is desired bcuz thats where the Colas and buds are gonna come from.
Overwatering is when the plants cant recieve any oxygen to the roots, and they begin to look droopy and sad. It can also happen when the plants roots suck up too much water and the stems and branches become too soft and flimsy. The plant will literally bend itself over at the stem (sorta like LST but without any strings or anything.) but in a few hours or days when the soil dries out it usually perks back up.
To prevent it I usually water my plants until the pot feels heavier than before I watered it. You could water until you see "run-off water" come from the drainage holes on the bottom of the pot, but I like to play it safe.
Its easier to remedy 'underwatering' than 'overwatering'.
The temps shouldnt exceed 95*F. Most plants can tolerate 90*F, but you MUST supply co2 or else the plants will become sick looking and probably will be stunted until you fix that. You do have a thermometer right?
Make sure U have a fan blowing around the grow room to circulate the co2, and to cool off the bulbs.
Keep the CFL's no closer that 4"-6" and no further than 10".
Right now Im using the sugar-water-yeast combination to make co2 and its lasted 31 days so far.
good luck and hopefully this helps