My wife has 7 normal size, and just got the super sized one. You can get the light bulbs at Lava Lamps directly. Not as easy as walking into your hardware store, but still available.
Well today was the third rocket in as many weeks. Last two were in the evening during prime viewing, and today's was in the morning (and I was working) so it was a bit hard to see. Still doesn't get old!
Today (not much to see)
Last weeks
Two weeks ago