what is this lightbulb device?

Wassup guys, i'm a newb....i've been growing my first grow and my plant has been vegging for 43 days.....its outside right now but i'm thinking about bringing it it ( punk ass thrips munching on it)......well anyways i was wondering what the device in this video is and where can i purchase one??? Its like a device for lightbulbs were 3 bulbs can screw into one lamp.......

you can see it in this video.....
http://www.youtube.com/watch?v=DpxSD3WLMZM