i just recently had a similar experience this weekend. rushed into neighbor's burning house. The fire has just started, there were thick smoke in the whole neighborhood, but the fire is still contained inside the house, when i was near the gate, i really wanted to back out going in, but a lot of people where screaming and yelling for water and light to see if there were still people inside, a lot of brave volunteers were there, and still no sign of firefighters in the area, I decided to come in the compound as well with other volunteers just to give them some "light", I found out that even the T5 has no use in really thick smoke. I can only see things 5ft around the torch. another guy came in with a big halogen type spotlamp, the spot cut trough the smoke farther. i got to use the T5 and P3D in action that night.
Good thing that the firefighters came in before the fire gets out of hand.