Ron the one thing you need to do is take advise from us and only us or at least some of us but not necessarily me but just the part about taking advice.
First this cold treatment thing.
It works but not the way you are doing it.
10C all the time is just crazy.
Next go to the 24 hour clock way of calculating time for light not the AM PM thing.
It is much easier to calculate time this way.
Next.
This whole bug free microbe free environment thing is way out of hand.
Next give the plants a chance to grow.
As I have said before with tests and control plants in about as a controlled experiment as I could do.
In the day time I had the plants outside in the cold in day light.
At night I brought them in to where it was around 65 degrees F, that would be 18C for you.
The plants brought in exploded and grew over night.
The plants left out didn't.
Keeping plants at 10C all the time for long periods of time in the so called growth camber will do nothing but make them sulk and in some cases stunt them.
You cant reinvent the wheel.
As a matter of fact 10C in a humid moist chamber spells disaster.
Why not have control plants and several things going on at the same time to see what does best.
Don't put all your eggs in one basket.
Not having controls is ((((NOT))))an experiment in cases where it comes to life forms.
You simply cant tell what you are doing without them for the most part.
Just my take on things and in no way trying to force you into anything.
Worth