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. "
Luton Town 01 Tyler 05 Beckwith Dismissed 15 Howells 17 Antwi 27 Hand 07 Lawless Booked 11 Willmott (O'Connor - 57' ) 19 Dance 08 Morgan-Smith (Kissock - 67' ) 10 Crow (Watkins - 46' Booked ) 13 Fleetwood Booked Substitutes 30 Pilkington 20 Kissock 28 Watkins 14 O'Connor 23 Samuel Lincoln City 01 Anyon 03 Nutter 04 Watts 13 Sinclair 16 Nelson Dismissed after an earlier booking 08 Power 10 Fuseini Booked (O'Keefe - 86' ) 15 Russell 30 McCallum (Smith - 71' ) 09 Perry Booked 19 Barraclough (Nicolau - 67' ) Substitutes 06 Hone 17 Nicolau 23 O'Keefe 14 Smith 24 James Wilson
Ref: Steve Martin