"On the approach lights, he also asked how long the lights of an ALSF-2 extended from the runway. I said 3000ft. It's 2600."

I'd like to know where he got this. Both the Jepps and AIM have the ALSF's listed in a range from 2400-3000'. Also, the part about descending to 50' is not a reg. If you are over the Approach light system and don't have the runway in site (REIL's, etc) then I would think you also have lost the visibility and would have to go missed anyways.