Max light intensity? (Sprites get too white)

I'm using sprite-diffuse (the default one included with unity) shader on my 2d game, and I have a couple of gameobjects with point lights. My problem is that sometimes the intensity of the light is just too much (when 2 lights overlap for example) and the sprite gets too white. Is there a way to set a global maximum of light intensity so that my sprites can't be lighter than the original sprite color?