How To Wire Lights in Series? Basic Electrical Wiring Series wiring for Lighting Circuits. These all Lights/lamps are connected in series. Each lamp is connected to the next one. The flowing current is same in all these incandescent bulb /lamps but the voltage are different. Good To know: This is not a suitable wiring for home or building. Wiring Lights in Series Connection Diagram | Electrical Wiring Nov 23, 2018First I want to show how to wire lights in series connection, in simple words a series circuit is a circuit in which we have only one path for current flow and only one way to flow the electron. When we talking about the AC or DC light bulbs, we know that we have to terminals in a bulbs or to contacts to provide the electric supply.