libgdx/box2d lights: change blur of lights

I was wondering whether it is possible to change the rate at which a lights intensity decareases over distance.

something like this:

So I finally figuered it out. You have to write a custom shader that is essetially the same as the default one, but change the line that takes care of the interpolation:

"v_color = s*quad_colors;\n"

for example:

"v_color = s*2*quad_colors;\n"

halves the dropoff rate, while:

"v_color = (s*0)+quad_colors;\n"

gets rid of any blur (leaving out the "s" completely out won't work)