You could go with a 500 lumen setup. I wouldn't go with incan though, unless you get IMR lithium-ion cells (unless current draw is under 5 amps, then the Lithium Ion cells I linked to will work just fine), because primary lithium (CR123) won't handle that in a 2-cell configuration. You could cause them to explode (Not good!)
If you go on google, and search for Cree XP-G R5 dropins, those will get you about 350 lumens out the front (95% of ratings are rated AT the bulb/LED. You'll never get that.)
If you are going to the game today, I'll be there, with my M4 with missing lower RIS. I'll be wearing camo, plus a black vest
~Sinful