Why not simply use a torch and show them the way?

Find someone who has read in bed using a torch.

They actually used a torch to cut a hole in the back door.

You will have to use a torch from the fire.

"Looks as if we'll have to use a torch on it."

Also avoid using a torch; its open flame can start a fire.

Using torches, they will gradually cut this piece down from the top.

Light signals - Made using an underwater torch at night.

They use torches in 10th grade, and we used them as seniors.

Using a torch he discovered that the tunnel was as before, and seemed to be in good repair.