animating light

I am relatively new to blender. I know about IPO curves and key frames and the like but I am unsure as to how to animate a light source turning on or off. My animation is of a hallway where one light at a time turns on going down the hall. Any suggestions? Thanks.

just put your mouse cursor over the material buttons window (in lamp settings with your lamp selected), press [i], and you will se a bunch of options. you want the [energy] one.

i hope this helps

BTW, welcome to elYsiun