I can tell you that from my most recent project that a single shiva was grown under blue cfl for approximate 8 months. (No red spectrum lights were used at all, also no natural sunlight).
After about the 3-4 mo period, she began to flower by herself, without any light schedule changes.
The only reason she died is because the power went out for four consecutive days hence no light at all, just pure darkness
.
I believe that she could have survived a lot longer given more light.