Help with Lighting Effect

[Mohadeb]

I would like to know the best way to do the lighting effects like they do on this website.

http://www.newezra.com/flash/

with the lights in the windows flashing… is this done best with Photoshop, if so what filters do you use, or with flash and again how do you do it.

http://www.loriannmusic.com/

here is another site that uses the same effect.

Thanks in advance for the help.

Mohadeb