Veteran defender Lyttle played in the Premier League with Nottingham Forest
Luton's hopes of automatic promotion suffered a blow after defender Des Lyttle fired home a Tamworth equaliser.
Hatters defender George Pilkington had given the visitors the lead when he powered home a header from close range following Keith Keane's corner.
But a shaky second-half performance was punished by 38-year-old Lyttle, who struck from the edge of the box.
Chances were few and far between after that, but Pilkington came closest late on with a shot that whistled just wide.
Luton came into the game on a nine-match winning streak, but struggled to stamp their authority on a five-man Lambs midfield.
Despite an attack that had scored 25 goals in five games prior to this match, the Hatters looked edgy and nervous until Pilkington's header bailed them out.
Luton almost doubled their lead early in the second half, as Tom Craddock charged down a Michael Blackwood clearance, but Simon Heslop's follow-up was tipped wide by Danny Alcock.
But the home side refused to be overawed, and Lyttle took advantage of Luton's hesitancy to crack in an equaliser from 18 yards.
The visitors looked to drive forward in search of a winner but never seriously troubled the solid partnership of Chris Smith and Michael Wylde at the heart of the Tamworth defence.
A late Pilkington effort was as close as Luton got to claiming all three points but the shot flew past the upright.
Stevenage Borough's routine 2-0 win at home against Forest Green Rovers means the Hatters are now four points off the top of the Blue Square Premier table and may have to settle for a place in the play-offs.
Tamworth: Alcock, Lyttle, Chris Smith, Wylde, Blackwood, Tait, Jay Smith, Shaw (Lake-Gaskin 90), Pritchard (Briscoe 90), Sheridan (MacKenzie 78), Christie. Subs Not Used: Wright, Mitchell.
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