Nice Running Two Lights Off One Switch
To add a second light which is switched with the first one the switched line neutral and earth need to be extended to the second light.
Running two lights off one switch. The other way to wire multiple lights to one switch is to connect all of them directly to the switch in a home run configuration. This will allow you to connect the first light as you described above and to run this additional light from the same switch by utilizing the red conductor in the 3 wire as the switched conductor and the black wire as the continuous hot wire. Duane 8 years ago.
A picture is always worth a thousand words. This diagram shows the additional cable connected to an existing ceiling rose. I have flood lights on the 2 back corners of my home that are operated by 1 switch.
Refer to the following diagram for a visual. How to add one or more additional lights so that all are operated from the same switch. Green to ground the white wire on the timer to the neutral white wires splice that will be in the box and the black wire on the timer to the hot conductor one of the two on the existing switch then the timer red wire to the black wire on the existing switch that is connected to the lights.
You can do this light switch wiring in one of two ways. There is one more switch right beside that switch that powers a different light. The second option allows you to easily disconnect fixtures you no longer want to use but it becomes cumbersome when more than two fixtures are involved.
The most common is to daisy chain the light fixtures by connecting them to each other and hooking the first one up to the switch. To wire this circuit in this manner you will need to run a 14 3 between the two light boxes.