Lennon felt he got his set up wrong in the opening half, in which Hibs were rewarded for their early dominance when Leigh Griffiths got between Thomas Rogne and Fraser Forster to score the decisive goal.
"I thought it was a great atmosphere, a great game, played in great spirits and I'm not disappointed with our performance at all," said Lennon.
"For 70 minutes we dominated. I was disappointed with our final ball and composure in front of goal but on another day we would have won comfortably.
"In terms of attitude, desire and intensity I can't fault the players at all. It was there for all to see, we just lacked an edge.
"I am disappointed with the goal obviously and my own formation. I'll take the blame for that.
"The three at the back didn't work for us today, but when we went back to a flat back four we looked in control."