Pixabulbs have the traditional strawberry C9 style lens and provide a great way to create outlines. This version is data-redundant in that if one goes out, the rest stay lit and pass the data along. With that in mind, they are a safe way to outline gutters and eves without the worry of having to climb a ladder if one goes out. These are 4 string pixels, this means there is a Data 1 and Data 2 signal. The wiring diagram is as follows starting with the wire with a white stripe: Ground, Data 1, Data 2, Voltage.