I have two magicshine clones from amazon, both with the disperser lens. It starts with a spot that's about 9" wide, and spreads it into a bar that's maybe like 9" by 5'. If you rotate it so the length is forward, then you have light in exactly your straight-ahead path, but to me it's disconcerting to be so dark to the sides.

My own light, as I said earlier, zoomable head cree led flashlight. Pointed at a downwards angle and zoomed to give me a spot that is maybe 6' across and 12-15' forward. I run it on medium, and in dead 'winter', when I use the light both ways, a single 18650 2400mAh battery goes a whole week. I have two batteries, and rotate them weekly.