I mean if it's already so specific as to require block coordinates and requires commands to obtain, why not just use commands or command blocks?
Place a redstone block next to the circuit you need to power:
/setblock x y z minecraft:redstone_block
Remove the block when you need to deactivate it:
/setblock x y z minecraft:air
Adding/removing blocks too conspicuous? Then set the block state specifically.
/setblock x y z minecraft:lit_redstone_lamp
/setblock x y z minecraft:redstone_lamp
This should appear as the lamp simply turning on or off.