I updated with the Blend-background to True and put the NormalMap layout with the planets first.
The other layout is to test the Spotlights but i can't get working so i leave that at the moment.
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The problem of the lights enable/disable is that with 1 they multiply by their efect for 0 the efect becomes 0. In my case if i set some light to 0 when i run the layout works correct, simply this light is not visible.
So to be clear, in your case in the moment you put 0 to any light, when you run the layout the texture with any light at 0 comes entire to black? I mean, in my case if i put 0 in the preview looks black but when runs is all lighted except the one i disabled, but if i understand well, in your case when one is 0 turns all the texture to black ¿Correct? is this?
Edit: In that case i guess i will have to use an IF instead the multiplier. Tomorrow i will try.