Animating Halo Intensity?

I have a problem. I cant seem to figure out how to animate the intensity of the halos for some spotlights. Does anyone know how to get around this. I need to be able to have the halos flashing. If not, I’ll have to see what else can be done.

Thanks all.

There is probably a more elegant way, but if you select ‘Halnt’ and CTRL+LMB in the IPO Editor window it will create an IPO Curve.

Hey that works! Thanks! I wonder why it’s not on the menu when you press I?