Well both variants are useful, I think. For just being brighter I figure a second skin with the orange parts should be addressed by ambient (my.ambient).

The second version would be: Four skins, one for each glass pane, addressing lightrange and setting SPOTLIGHT via script. In both cases I would give the model an action in which the ambient or other parameters are set for a speficic skin.

How do I address a specific skin in script, say, attach "my.ambient" to skin #2 of lamp.mdl? Can't find it in the reference.