just ebay the cheapest china torch you can find with your wished output (but be aware the levels stated on china ones are usually fake - my "real" 640 lum torch is brighter than my china clone 1200 lum torch). also, try to find one that uses 18650 batteries, they are superior to most others. oh and check the switch type, one which have mode select and on/off on the same switch is pretty useless for airsoft.