Spot about storks carrying bulbs?

Hi guys. I need to find for a reference a spot that promotes the use of low energy bulbs. It's about birds (storks if my memory doesn't fail) which are carrying different kinds of bulbs, low energy ones and the old ones. The storks which carry the old ones fell down while the others keep flying normally. The aesthetics were sort of surrealist. Does anybody knows which spot I'm talking? Any help will be useful.