Stephen Humphrys joined Bradford this summer after leaving Barnsley
Bradford inflicted Luton's first defeat in League One with an impressive display in a 2-1 victory at the University of Bradford Stadium.
Goals from Stephen Humphrys and Bobby Pointon guided the Bantams to a second successive home victory on their return to the third tier.
Humphrys had two decent attempts before putting Bradford ahead.
He fired an early shot past the far post and had a flick header clawed away by Josh Keeley.
But Luton fell behind after 34 minutes when Antoni Sarcevic reacted quickest to a deflected Curtis Tilt pass and laid the ball back from the byline for Humphrys to tap home.
Bradford doubled their lead early in the second half when Bobby Pointon finished from Josh Neufville's cross.
Luton had won their two previous games but could not find a way back. Skipper Kal Naismith's free-kick was beaten out by home keeper Sam Walker.
Bradford should have had a third when Will Swan and Tyreik Wright broke clear but Wright's shot was saved by Keeley from six yards out.
Luton pulled one back through Gideon Kodua's header but Walker made a late save to secure the victory.
Report supplied by PA Media.
Post-match reaction
Graham Alexander: 'I'm really proud of the players' (BBC Radio Leeds)
Matt Bloomfield: 'There's plenty for us to improve on' (BBC Three Counties Radio)
