I just received a Ultrafire 501B XM-L from DX that puts about 400 lumens out the front. It will be used most of the time a to be seen light in the day time. I have no doubt that it will be a good night light.
As far as run time goes it lasts 1:40 on high.
Is this the sort of thing you are carrying on about? http://www.lighthound.com/Lumens-Fac...LY_p_2838.html