For fun I want a light that can start a fire. I don’t have a clue about modding so it will have to be a store bought job.
I assume multiple 18650, multiple emitter and some kind of focused lens.
What are some good choices? Keep it budget. Less than $50 would be great. Would prefer it to be LED if possible but I know they don’t produced as much heat as other lights.
I also want it to start a fire with the light output NOT BECAUSE OF faulty batteries or some other mishap. LOL!!!
Here you go 
I think you may need to skip on the LED part. Xenon drop-ins can be focused to light paper. But these were old stuff, quite a few years ago, I don’t know if these are still available without modding.
Here you go:
You can buy one from Lux-RC, and turn off the "bounce switch" feature. 
4100 lumens and the light out the front is hot enough to start a fire, just as you requested. “Budget” ain’t gonna happen, though. It’s about $200USD. 
Yes, I think you need to pass on LEDs and go for a HID torch, more than 50w I believe (I don’t really know the needed wattage, I always looked for best efficiency, not most-power-hungry on purpose ha ha ha - that said HID ain’t too bad as far as efficiency is concerned).
http://cpsc.gov/en/Search/?query=LED&filters=flashlight
includes all of the flashlights (among other LED items) that have been reported as causing fires, to date.
Just check your local cheapo discount mart or mail order supplier.
http://www.cnqualitygoods.com/goods.php?id=2076 with a 6 cell carrier and 250W bulb and you’re sure to catch something on fire!
Mag623 here:
Here is a list of other powerful incandescent flashlights that can also burn paper
But why stop at paper??? You can also cook eggs!!! :bigsmile:
I think any flashlight that mwfire modded could start a fire or at least smoke like it’s on fire. :bigsmile:
Magic Scorpion Transformers 250W Hotwire Burning Flashlight
Anything but wicked laser garbage. Horrid company. Marketing high power lasers as play things. They sold a Dual ended 1W + 1W just-try-not-to-blind-someone “Sith light saber”. Plus many reports of piss poor quality.
Save your cash, you don’t need flashlight for that, battery will be enough, battery and a rock 
9 volt battery and steel wool will start a fire.
If you got a big pile of brush that is green, shove a road flare in the bottom of it. It works great. Learned it from a cop friend. I wonder where he got all of his road flares from. 0:)
Matches work too …just saying. Jet lighter if you prefer… or even a simple Bic. 