I have several of these Rolson branded 2xAA "aluminum" (probably the "monkey metal" so famed in motorcycle engines) lights that came free with Rolson (i.e. dirt cheap Chinese quality control failures) tool kits of various sorts. On a good day they produce rather less light than a dying glow-worm while killing batteries in very short order. The bulb is massively outdone by a stock Solitaire bulb. In fact the bulbs look about the same size as solitaire bulbs.
If I can find one I've not stomped to death I'll post pics.
http://i83.photobucket.com/albums/j282/dulridge/IMG_0552.jpg
http://i83.photobucket.com/albums/j282/dulridge/IMG_0555.jpg
The nasty blackened thing is the bulb - this has maybe seen 1 hour of battery killing use ever. Anyone who wants one in order to experience the horror is welcome - failing that, this one is for the bin which is the best place for it.