Despite playing over half the match with 10 men, Luton stretched their unbeaten run in the league to 15 games with victory over Lincoln City.
Dean Beckwith saw red for the hosts after an off-the-ball altercation with visiting forward Kyle Perry.
Stuart Fleetwood hit the crossbar and Danny Crow somehow scooped a shot over the bar for the Hatters.
But Fleetwood slotted home the winner from John Paul Kissock's pass before the Imps had Mitchell Nelson sent off.
VIEWS FROM THE DRESSING ROOM
Luton boss Gary Brabin told BBC Three Counties Radio:
"The second-half performance, being down to 10-men, provided a thoroughly deserved win.
"I'm not going to make excuses over the sending off - I think it was an elbow - it's disappointing. "