You need a trusted third party to collate all of the information about a product category and then filter out all the crap. I have conveniently already done this for flashlights:
http://flashlights.parametrek.com/index.html
(Yes, I run it and yes it uses affiliate links.)
Also, AAA cells are terrible for flashlights. A single AAA cells is okay for a compact penlight but many use 3xAAA cells and 95% of the time 3xAAA lights have the worst engineering of any flashlight.