@Harry, I think it is nice when look at how it is done, e.g. http://www.mapillary.com/map/im/0heuWipkuG62pvZerrHdvg/photo
A flash light does not distribute the light evenly - there is the spot in the center. But using a light that does that (like a strong photography flash) the area closest to you will usually be blown out while the center will be dark (DSLR, raw and HDR is left out here).
In your case I would normally just stop for the day, but some picture is better than no pictures. You can see the path and everything, which is useful to somebody.
I think that the only way to make it better is to put the phone (I assume) on a tripod and take each photo with a very slow shutter speed. Even one of the good battery powered LED panels, with even light distribution, will light the close areas up much more than the far areas. and you should use multiple lights and set them up for each shot to get really good images.