Change Voltage with switch of an Neuron SBEC

[cocoda36]

Good Evening

I'm searching a solution to dimm led's.
Now I had an idea.
With a Lua Script you can change the voltage of an FrSky Neuron 8A 2S-6S SBEC between 5V-8,4V.
Is it possible to use an 3 position switch to change the voltage?
Example:
1 Position 6V
2 Position 7V
3 Position 8V

Thank you for your answers