You can always light your bowls with matches, you know. I was assuming you were using--and asking about--some sort of heavy-duty lighter fluid like you buy in cans at the pipe stores or barbecue grill places.

Captain, are you simply worrying about residue vapors from a cheap disposable lighter? Because if that's the case, I think there are far more important things to be worried about. Truly. I think any exposure you're getting to butane, which is usually what those contain, is negligible. I just realized you might not have been talking about the same fluid I was. . . .