The Sofirn SP35 is a 2000 lumen flashlight that comes with "ATR" or Advanced Temperature Regulation according to Sofirn. There's a Luminus SST-40 emitter under the hood that you can get in either 5000K or 6500K (I have the 6500K one as it's brighter!)
The Sofirn IF25a is a high-powered budget flashlight that is capable of producing over 4000 lumens! I've looked around and this is the only light you can purchase with 3800-4200 lumens for only $30. It has the highest lumens to dollar ratio to my knowledge.