Last week I ordered half-dozen of the 4x credit card sized fresnel lenses on ebay. Cost me around 4 or 5 bucks I think. Now I know many order them a hundred at a time but this was just to test them... They came with clear covers and the first thing I did was take it outside to give it a try. It was a nice sunny day today. First I tried it with the cover on just to see what would happen. It wouldn't focus the light right. Took the cover off. Within two seconds of focusing the light the twig I focused on was smoking a lot. Then I used a long thin piece of bark. Same thing, after a few seconds it was smoking. But it burned a hole right through it instead of catching fire. I tried to angle the bark so that the flame might travel up...same thing...it was like a laser beam. I guess that is pretty much what it is. So how do you actually light a fire as opposed to burning holes?? I'm guessing you need to have a pile or something like that. Thanks -Emt1581 Wanna kill these ads? We can help!