I've done several Catt crosses, along with many other species, and there are not precise answers to any of your questions. Each and every species reacts differently.
Most will take at least a year before they need replating, some longer than that. When they use up the food in the mother flask, you replate.
The light you are growing under doesn't really make the protocorm grow - it is the food in the container supplying the nutrients. I've never had to replate protocorms, they have always had leaves and roots before the transfer. I grow under fluro lights and the fc's they receive is very low - probably 400-500 fc. Warmth is more important than light.
I have deflasked without replating but you will have to grow them another year, when they should be in a jar, but it can be done. I did it because the cross was important to me and was afraid I would contaminate the replate jar.
From the date you did the cross, to your first bloom, six or seven years if you are lucky.
BTW I use the term I did the flasking, replating, etc. I did not do it but I gave my husband all kinds of advice when he did it for me
Brooke
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