Video explains it all. Each pumpkin will have a C7 bulb inside, and Vixen will run a flickering routine on the pumpkin channels for those bulbs. I'll have 12 pumpkins or so total, and I'll place them throughout the yard in front of tombstones and in a pumpkin "patch".
The dimmer is an OEM of the generic ADJ/Chauvet 4 channel 1500 watt unit that I got on eBay. I have a few of them for my Xmas light show that I'll be using for Halloween too.