I mean not darker but the light stick on Vicky instead of sharing the light.

I think you are using the default Colored lights. Use white lights. Make all lights grayscale lights. 0,0,0 to 256,256,256. Should fix your problem. Karl

This trick solves, or at least makes more managable, a lot of lighting problems. Try parenting all three lights to an invisible box prop at the center of the scene. Also set each of the lights to "Point At" this same box. This allows you to rotate and translate all the lights en masse as well as allowing you to change to position at which all of the lights are pointing by just moving this box prop. This prop can remain parented to the universe, or you can parent it to one of your characters if you want the lights to follow them around. This also allows you to scale the lights (which you cannot do to individual lights alone) by scaling the parent box. Scaling the lights this way has a profound effect on edge transition smoothness of the cast shadows. I've got a tute on all this somewhere but I'm at work and don't have the url. Its in here somewhere -- if interested, search on "shadow" and it should pop up.

Thanks both I will try that.

It's the same problem the photographers found using coloured lights, a material can be darker or lighter as you use a color light or another. Even if the general tone of the skin seems equal, a warmer light tone has a darker effect than a colder one, and can be the inverse on some colors (red colour seems lighter when using a warmer light, while blue go darker) :-) It's a matter of color and light understanding. Hi!

....whoops, forgot to mention that you have to convert the lights to spotlights before you can parent them.

Thanks to all of you, I will try it and then come back if necessary.