28 hour photoperiod

On the re-vegers and some clones, I am getting new green leaf or white growth (single leaf growth or pistils). Surprising and pleasing me, for sure.
New growth will allow me to further trim to clean the “excess” green foliage that was left from the last grow or grab some clones, prior to shaping for flower colas.

Not the same story with the seedlings.
They are looking pushed or stressed (a little wrinkly or light color (not the usual darker green leaf color). Remembering they are 11/1 origin and all have been “up-planted” from solo cup origin solo cup dumped into hole in “occupied” bag residence.

Not seeing any “stretch” as yet.
Summary:
Not seeing any “stretch” as yet, probably too soon.
New green growth is definitely a positive result.
I don’t care if new growth is “reveg” or “still alive”, I am happy.
Happy with lighting routine, so far.
Green growth or pistils is good.
I am concerned that temperature in tent becomes too cold during OFF light and lung/garage night temps.
Mitigation requires 18/6 lights Off mid-day in winter (lung room low temp 55-60, currently and will be worse in winter. Sunlight (when available) heats lung room and grow tent gets fed warmer air.
or
Still looking for “referral” or recommendation on portable dual hose (600 SQFT/ 12,000 BTU minimums) dual function (AC/Heater), And yes Blue-Tooth.