Well spotted Moran ! "new light" and "old light" is total rubbish.
I bet those pompous Elders would be aghast to read what Charles Taze Russell said about it ! he said that there is NO SUCH THING as Old Light, he said that if a new understanding of Scripture totally wipes out a teaching, then it NEVER WAS light !
But of course, now you could be DF'd for teaching the "old light", and probably for teaching what later becomes " New light". Preposterous !
I strode a similar path to you, Min. Serv. giving public Talks, in other Congregations too, popular because those Talks were interesting, due to research, in my case, research quite often out side the W.T library, naughty boy wasn't I ? and eventually I decided the Governing Body and the Writing Committee did not have a CLUE about the Bible !!