I'm fairly new to electronics, and I was recently looking at some LEDs listed for sale online. Some LEDs were mounted on "star pcb":

![LEDs on star PCBs](https://i.stack.imgur.com/nR8L0.jpg)

From the picture, it looks like there are 6 connections. I'm pretty sure the LEDs just have 2 (an anode and a cathode).

Can someone explain the purpose of the other connections, or what the star shape pcb is used for? I tried googling, but all I could seem to find were more star pcb items for sale.