I heard that Green Crack was a fast hybrid but I don't know the percentages. There's no such thing as a popular clone only strain; you can take a female plant and force her to pollinate herself through chemistry. There are several seedbanks that sell SSH seeds but I couldn't vouch for any of them so do your homework before ordering.
Lollipopping is one of those debatable practices. Some people do it; some don't. I'm not a fan of the idea because a dead or dying leaf/branch doesn't waste as much "energy" as some people would think. It can help with under canopy airflow some so some people have a oscillating fan blowing under the canopy and another above. That could be another experiment after you test your light idea; one room lollipopped; one not. We'll turn you into a mad scientist...

