Town boss Nathan Jones was left frustrated with his side's performance as a late goal from Jack Taylor secured a 1-0 win for Barnet over the Hatters.
The Town failed to match the intensity they showed last week in the 8-2 beating of Yeovil Town, as Barnet did well to frustrate Jones' team throughout the 90 minutes.
The Hatters gaffer said: "We just didn't do the basics well enough. We didn't pass the ball well enough, we didn't cause them enough problems. We didn't win our headers, we didn't win the second balls. We didn't get a foothold in the game. We didn't do it, we absolutely didn't do it.
"The pitch didn't help, it's a real sticky pitch. It wasn't conducive for a fluent game. We didn't do the basics right. If we do the basics right, we get a draw.
"Pelly-Ruddock showed a lot of endeavour, running and was good in possession, but apart from that we had no real cutting edge, that was the sad thing today."