Lupton's fate aside, he was happy with the performance.
"We were pretty well on top most of the way."
Stephen Perofeta had a good match, as did Ollie Paine.
Jonty Nesbit scored two tries in a backline that did well.
Collegiate travel to New Plymouth next Saturday to take on Francis Douglas Memorial College.
Lennox was "well aware" the Taranaki team are in good form.
After disposing of Palmerston North Boys High 28-3 in the first week of competition, FDMC beat heated home town rivals New Plymouth Boys' High 24-10 on Wednesday.
The match was played under a cloud after NPBHS principal Michael McMenamin enforced a ban on FDMC students attending the match at the Gully Ground.
The act only served to fire up the visitors for just their fourth victory in the last 12 years of the clash.