reelbigchair...

I dont want to split hairs here, nor do I want to spend my whole day arguing over this small point.

But... I really doubt that the lighting comment could have been made at 80 knots. It was said nearly 8 seconds before the captain made the 100 knots callout. You're right I don't fly the CRJ, but it seems to me that 8 seconds before reaching 100 knots the MOST you could be doing is 50.

I also know that when the pilot flying says "Set thrust" they often say it AS they advance the thrust levers, and also the first few seconds are (obviously) the period where the airplane is accelerating the most slowly.

My educated guess would be 30 knots but maybe 40. I'd be surprised if the CRJ could take more than 8 seconds to get from 40 knots to 100 but I don't fly it so I'm not speaking from experience.