I could like to create a really simple light engine that does not eat to much CPU and will produce this effect:
I am using libgdx for my game with box 2D light (which is too heavy for my needs). I have no idea of what is the best solution to create this effect (shapeRenderer? pure shader?). For the moment I don't need any shadow casting, but I would like to be able to maintain multiple light sources and to add color to the light.