Other considerations when choosing a flashlight (and anything else that uses batteries in a survival situation) is to get all those electronics in sync power-wise. Select those items for battery commonality. There's a relatively current thread on lowly battery-operated radio which may be useful to peruse. In many things, standardization is a good thing.

BTW, I like radios that use AA batteries and 4Sevens AA flashlights that run from sub-1 lumen to over 200 lumen. My go-to light around the house is a 2xAA 4Sevens Quark Pro powered by NiMH rechargeables; the light comes on in Moonlight mode (0.2 Lumen) which is usually enough light, but a couple taps later is significantly brighter. I used the Max lumen setting one time inside the house, never again, at night that is just way too bright and totally destroyed my natural night vision.

My GPS runs on AA NiMH rechargeable batteries too.