"light a torch" is a correct and usable phrase in written English.
You can use it when you want to describe someone lighting a torch to provide light in a dark area. For example: "The traveler lit a torch to guide his way through the pathless forest."
This year, the spiritual leader of the small but loyal Druze community will light a torch.
Tomorrow the catholicos will go to Khor Virab, where St. Gregory was imprisoned, and light a torch at midnight.
But he didn't hesitate to blast a government committee last year for failing to include Arabs among those designated to light a torch during Israel's Independence Day ceremony.
At one point, with danger all about, Jinx decides not to light a torch because it will take too long; a moment later, he lights it anyway.
We watched a hero light a torch and fight his greatest fight of all on the world stage once again; a battle against the disease that ravaged his body but couldn't take the spark from his eyes.
"Right now, the wireless industry is circling the wagons around Clearwire and getting ready to light a torch," says Berge Ayvazian, an analyst with the Yankee Group.
Meanwhile in Dublin, performers took part in a People's Procession of Light, a torch-lit celebration illuminating its way through the city.
Mr. Bush laid a wreath and lighted a torch in memory of the victims.
He came full circle with the people of his country when he lit a torch that seemed to create new light in the 1996 Olympics.
On Thursday, Katerina Lehou, an actor playing a high priestess, lit a torch from the rays of the sun at the temple of Hera, using a parabolic mirror, to set off a domestic relay.
Insolence and narcissism lit a torch that led a generation through what might have been a dark age, for by 1983 one-third of Britain's jobless were under 25.
