Vizy has an optional light that can be used to offer subject lighting. It can be controlled from software running on Vizy.
The light is software-controlled and normally the pins on Vizy's I/O connector don't supply power until you tell them to do so. The easiest way to enable power (currently) is through Python code, or by bringing up a Python interpreter.
To quickly test things out, turn on your Vizy and point your browser to it. (Please refer to the getting started guide if you need help with connecting to your Vizy, etc.) Bring up a Python interpreter by clicking on the ☰ icon in the upper right corner and selecting Python.
This will bring up a Python interpreter. Within the interpreter type in the following:
from vizy import VizyPowerBoard pb = VizyPowerBoard()
Then to turn on:
pb.vcc12(True)
To turn off:
pb.vcc12(False)
Note, this is just for testing. Applications will do this in a more automated way!