The best way to do this is to make a pigtail which means to twist all the black wires going to fixtures together with a 6 inch length of spare black wire. Wiring a 3 way light switch.

How A 2 Way Switch Wiring Works Two Wire And Three Wire
Wiring 2 lights with switch at end of run. With power through wiring power enters the switch box. So an end of run switch is the last component in the wiring of a circuit and in effect the wire feeding the switch is coming from the light fixture and not the other way around. Connect the black wire from the switch to the black. Pull one end of each cable through the back of one of the light fixture electrical boxes. Wrap the end of the white wire at the switch box with black electrical tape. The hot and neutral terminals on each fixture are spliced with a pigtail to the circuit wires which then continue on to the next light.
Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. Screw a wire cap onto the spliced joint then connect the short wire to the load. Just a ceiling electrical box with a circuit in it. Wrap the end of the white wire at the ceiling electrical box that leads back to the switch box with. Step 2 this tutorial will explain the job as if there is currently no light fixture or switch installed in the room. The neutral wires are spliced and a black wire connects to each switch terminal.
With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. 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. This diagram illustrates wiring for one switch to control 2 or more lights. The feed wire the hot wire coming from the service panel runs to the switch before it goes to the fixture. Strip the insulation from the wires at the ceiling electrical box and the switch box to expose 12 inch to 34 inch of bare electrical wire using a wire cutterstripper. Wrap a piece of black electrical tape around each end of this white wire to indicate that it is a hot wire rather than a neutral wire.
In home run light switch wiring each outgoing hot wire must be connected to the load terminal of the switch. Two cables enter the switch boxone supplying power and one going to the fixture. Connect the black wire from the power supply to the white wire of the cable connected to the switch. Run 12 gauge electrical cable between each switch and the light it controls. Multiple light wiring diagram. The source is at sw1 and 2 wire cable runs from there to the fixtures.
To wire this circuit in this manner you will need to run a 143 between the two light boxes. Run your cable from the first light to the second light.