I just spotted a 2D Taskforce plastic light with a cree LED (XRE I believe) listed as "53 lumens" output at Lowes today for $13. This is a yellow "rough type" plastic light. They also had a 2AA version but it was only 15 lumens and had some unknown LED in it (probably a half watt smd type). 53 lumens isn't a huge amount but in a tough looking plastic light it probably runs for days off 2D cells and is lighter than an Aluminum light.