The code is maximum 12 boxes per circuit breaker.
You can connect a 12-2 NM W/G cable to one of the outlets. Black-to-black and white-to-white and ground-to-ground. Black is hot, white is neutral, and ground is ground. And bring that cable into a hollow-wall box you install 50" high on the wall. Then run the 12-2 cable up to your light fixture.http://waterheatertimer.org/images/GE-15312-single-a-300.jpghttp://waterheatertimer.org/How-to-wire-switches.htmlhttp://waterheatertimer.org/OWB1.html
You can also replace one of the outlets with a combo switch-outlet. The run singe 12-2 cable up to light.
This wiring diagram shows half way down how-to-wire-switches page.
Outlets have wide blade on neutral side, and narrow blade on hot side.
The black hot wires from old outlet connect to side of combo device with narrow blade.
The white neutrals from old outlet, and new wire going to switch, all connect to silver screw on wide-blade side of new combo device.
The black wire going to new light connects to screw next to switch located on wide-blade side of device.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7