It isnt unusual to wire two or more light and switch combinations from the same power source in fact its common practice. Wiring 2 lights and 3 way switches.

2 Way Switching Diywiki
Wiring multiple lights and switches on one circuit diagram. How to wire two separate switches lights using the same power source. Multiple light wiring diagram. This diagram illustrates another multiple light circuit controlled by 3 way switches. This diagram illustrates wiring for one switch to control 2 or more lights. The source is at sw1 and 2 wire cable runs from there to the fixtures. Wiring multiple lights to a single light switch is similar to the basic light switch configuration with the additional light bulbs attached to the first one as shown in the diagram.
Multiple light switch wiring with conventional light switch wiring using nm cable a nm cable supplies line voltage from the electrical panel to a light switch outlet box. Before you can wire multiple light fixtures to a switch you have to know how to do just one. As with the other diagrams on this page more lights can be added by duplicating the wiring arrangement between the fixtures. Here the source and the fixtures come before the switches. Every 120 volt circuit that powers lights in a typical home has two conducting wires and a ground. One of the conducting wires is black and its the hot one meaning it carries the electricity on its outward path from the power source to the load.
You can add as many lights in this fashion as need within the load limit of your wiringcircuit breaker light switch diagram multiple lights pdf 42kb back. Another nm cable connects the first outlet box to the next boxes and so on until you reach the end of the chain. 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.