Just so you know, tested the tesco AA torch against my 6v surefire and 6v digilight combat light and there wasn't much in it, the throw of the beam isn't as tight as the surefire but the brightness is superb and my led surefire is lumens not sure what the tesco one is.
will have to try it against my logun gun lamp, but ive got a feeling that it will be replacing it might even buy another for my other rifle haha.