Hello:welcome:
Just a caution, you'll have to be prepared to deal with the dangers associated with running a high-discharge lithium powered light.
With-out any changes, probably a lumensfactory e0-6, will do ~200lumens on two fresh cr123's.
Best place for info on incandencent lights is the incan forum. People are friendly there and they love new adherents to the power of burning fillaments. Read the beginners guide to incans there and it'll tell you all about cells, lamp assemblies, and how to make it all work out in your favour.
Best may be lumens factory drop-ins (your size is d26). A few things determine which drop-ins you can run.
1) batteries. for the brightest and best, you'll need some IMR batteries.
2) tailcap - any regular surefire / solarfoce / whatever clicky tail-cap may fry under the current from an IMR powered LA (lamp assembly). You'll need to get a twisty -or- an AW soft-start clicky (rated to 75w) Netkids clicky (3a) may do you.
3) If you do those, you can get an Eo-IMR-9, put in two fresh AW IMR 16430's and have blazing hot lumens for 8 minutes.
4) You'll need an extender for more cells if you're going to run for any meaningful length of time at high levels.