The phrase "a string of lackluster" is correct and usable in written English.
It can be used to describe a series of things that are dull, uninspiring, or of poor quality.
Example: "The movie was a string of lackluster performances that failed to engage the audience."
Alternatives: "a series of uninspired" or "a chain of mediocre".
Alabama continued forward, turning a string of lackluster matchups into a series of lopsided victories.
For United, was their first league defeat a long time in coming after a string of lackluster performances in the league and the Champions League?
A string of lackluster earnings reports weighed on the stock market on Tuesday, ending an eight-day winning streak for the Standard & Poor's 500-stock index.
Playing without Jim Calhoun, who is sidelined from the sideline because of spinal stenosis, the Huskies have played a string of lackluster games, and are 15-9 over all, 5-7 in the conference.
After a string of lackluster technology IPOs, tech-focused real estate brokerage Redfin reversed the trend with big first-day gains and sustained aftermarket performance.
After a string of lackluster records, lawsuits, issues with record labels and a brutal divorce, the last few years looked like they sucked the life out of Nas.
The premiere follows a string of recent lackluster drama attempts, including "Mind Games" and "Killer Women". .
Earlier this month that was the scene at the Westport Country Playhouse, a fabled monument to summer stock whose glittering past has been somewhat dulled by a recent string of lackluster seasons.
As we now cross the six-month mark in the Obama presidency, it is becoming ever more difficult for the president to distance himself from a long string of lackluster economic reports.
In the Derby, Essence of Dubai continued Godolphin's string of lackluster performances by finishing ninth.
Anand has struggled in recent years in events other than title matches, and his performance in Bilbao continued that string of lackluster finishes.
