I've been in the Fire/EMS field for about 12 years now. If all she truly needs the light for is the occasional search around the scene of a MVA, I would suggest either the SureFire G2L or one of the Inova T series lights (2007 version T2 would be my choice of the series). The T1,2,3 are all cheaper than the G2L, and would withstand more abuse, in my opinion, than the G2L. I'm not bashing the G2L (I love mine!), but I believe the Inovas would survive being run over by the squad. Both are great quality lights and both are "Made In the USA!". If it will be used as little as you suggest, even the standard incandescent G2 would be fine, and cheaper! Any of these lights would drop into her pocket/jump kit and be ready for use in a snap. Since they all use CR123s they would last for years before the batteries need replacing, if she doesn't use them. The CR123s also work better in colder weather, especially if stored in a cold vehicle in the winter. My Fenix T1 just showed up today, and it could be another option, it is an awesome light!
Roger
BTW, the Inova's clicky switch is easier to operate one handed, IMO, than the twistie on the G2L. But the G2L is easier to mouth hold, if it comes to that. No, its not sanitary, but I've been there and done that when the SHTF!