I have a pair of ten-second animatios of any real value to my credit(as of right now, lol). Not planning to put them up for public viewing any century soon.

The tutorial covers extremely basic keyframe animation, so I'm not touching the lights or any of the animating cameras. I value very highly what little is left of my sanity ;) I haven't seen a light  animate on it's own yet, but I can think of cases where I've touched a light to change it's color, and changed it's position just slightly while selecting it. Then run the animation and watched the light do fun things. Alway in Poser 6 and 7, I run an animation after changing a light or animating camera in any way. If I catch it right away, then I can undo the damage readily :)

I'm going to get off my soapbox now, and let you get back to your day