Story of the match
On a day where Neil Harris needed his players to perform, his Cardiff City side got off to the best of starts.
After just four minutes, captain Sean Morrison poked home from Harry Wilson's corner, after the ball sailed to the back post.
The lead was doubled five minutes later, when Mark Harris, who was making his first start of the season, coolly slotted home inside of the box, finishing off a brilliant counter-attack.
Moments after the second, The Hatters nearly replied instantly. Pelly Ruddock latched onto Kiernan Dewsbury Hall's defence splitting ball, but his effort was comfortably saved by the on-rushing Alex Smithies.
After quite an eventful opening 15 minutes, the action-packed nature of the first half started to diminish. The visitors enjoyed large spells of possession, but were unable to create anything of note.
Harris then had the opportunity to score his second and Cardiff's third when he capitalised on goalkeeper Simon Sluga's slip and stole possession in Luton's box. However, the Croatian international reacted brilliantly and picked himself up to stop Harris from scoring a goal that would have probably killed the game.
Five minutes before half-time, Nathan Jones brought James Bree and Sam Nombe on in search of a way back into the game. The former was involved instantly and did well to tee up James Collins, who saw his effort flash wide of the post.
Cardiff started the second half brightly too and had the opportunity to make it three, when The Hatters defence failed to clear a long throw. The attempted clearance eventually fell to Joe Ralls, who saw his free header sail inches past the post
The hosts added a third on the hour mark when Kieffer Moore nodded home from a corner, and provided Wilson with his second assist of the game.
Less than a minute later, Sheyi Ojo should have made it four, after nodding a deflected cross over, from no more than two yards out.
However, the Liverpool loanee did find the back of the net twenty minutes later, when he fired home from the left side of the box, after Luton failed to clear another set piece.
The Hatters best chance of the game came as late as the 89th minute, when substitute Joe Morrell struck the inside of the post from range.
Cardiff looked dangerous every time they went forward and were particularly strong in the air. Harry Wilson and Shayi Ojo were particularly bright, they created a number of goal scoring opportunities and on another day, may have come away with some more goals and assists.
The Hatters have been a tough team to break down this year, but looked very vulnerable at the back. The two centre halves had a difficult game against a dominant Kieffer Moore, and the two full-backs were given a tough time by Cardiff's flying wingers.
Stand out performers
From a Cardiff perspective, captain Sean Morrison particularly stood out in central defence. He opened the scoring with a clever run to the back post and was defensively solid. He won almost every battle against James Collins, who barely got a sniff all game. A thoroughly professional performance from the captain.
If Luton were ever going to score against Cardiff, it would have come through Kiernan Dewsbury-Hall. He was clever in possession and looked threatening when he carried the ball, but unfortunately not many other players in a Luton shirt were as energetic as he was.