Chris Scott "Lights Out" Lytle (August 18, 1974 in Indianapolis, Indiana) is an American mixed martial arts fighter, boxer and a veteran of the Ultimate Fighting Championship. Lytle is the reigning Cage Rage World Welterweight champion, and was prominently featured as a welterweight on The Ultimate Fighter 4: The Comeback.

Lytle started training for fighting in 1998, saying that it was "something to keep me active". He trains part-time outside of his regular job as a firefighter, attending single-discipline gyms rather than MMA camps. He has held championships in the Hook N' Shoot and Absolute Fighting Championship promotions, and recently won the Cage Rage World Welterweight Championship. He is became the 175 lb Indiana state boxing champion, saying, "By the end of the year (2004), I think I'll have a few more smaller boxing titles."

In 2006, Lytle was a contestant on The Ultimate Fighter 4 on Spike, where he defeated Pete Spratt and Din Thomas in exhibition bouts to proceed to the welterweight finale. On November 11th, Matt Serra defeated Lytle by split decision in The Ultimate Fighter 4 Finale. Lytle was the more active fighter on the feet, with Serra tying up and using foot stomps until he got takedowns, at which time he became the more active fighter, with Lytle holding guard and seemingly waiting for the referee to stand the fight up. Two judges scored the bout 30-27 for Serra, and one judge scored the fight 30-27 for Lytle, but despite the scores the match was very close. He lost to former UFC Welterweight Champion Matt Hughes on March 3rd at UFC 68 in Columbus, Ohio via unanimous decision.

Lytle fought Jason Gilliam at UFC 73 on July 7, 2007. Lytle controlled the pace of the fight in the first round and eventually brought Gilliam to the ground. Lytle worked from top position, and eventually sunk in an inverted triangle choke from top position. To seal the fight he locked in an inverted armbar on Gilliam's free arm, forcing him to tap.

At a United Fight League show taking place in Indianapolis, Indiana on August 11, 2007 Lytle defeated Matt Brown by guillotine choke in the second round.

After losing to Thiago Alves at UFC 78 via a controversial doctor stoppage due to a cut at the end of the second round, Lytle went on to defeat Kyle Bradley at UFC 81 by KO at 33 seconds of the first round. In an interview after the fight, Lytle stated that he had a new outlook on fighting; he would no longer pursue an "overly-technical" approach to each fight, but would go into his next fight and "not be afraid to lose."

On July 5, 2008 at UFC 86 Lytle lost to Josh Koscheck in a UFC Welterweight title eliminator fight. Kosheck used a brutal ground and pound style to open up massive cuts on Lytle's face and ultimately won by decision.

Lytle's next fight was against British fighter Paul Taylor at UFC 89 on October 18th, 2008 in Birmingham, England. Lytle won a unaminous decision. The judges scored it 29-28 (twice) and 30-27. The decision resulted in loud boos and Taylor was surprised at Lytle being awarded the judges' decision. Sherdog, MMAWeekly and MMAJunkie thought Taylor had won the decision. The fight was awarded Fight of the Night by the UFC and both fighters received $40,000 following their fight.

Lytle's latest fight was on January 17th, 2009, against Marcus Davis at UFC 93. Both fighters are former boxers and had discussed a potential fight in their futures since early 2008. Lytle called out Davis after his win in UFC 89. He suggested that the fight take place in Ireland, where Davis had garned a substantial following due to his emphasis on his Irish roots. Leading up to the event, both fighters promised to stand and trade blows for the entire fight, rather than engage in grappling. Lytle managed to stun Davis several times, but Davis used superior footwork, counterpunching, and kicks to win a split decision. The bout shared Fight of the Night honors with the Coleman/Rua co-main event, earning Lytle a $40,000 bonus.