If you are using Hyperion, there is a ST DTH for your hyperion setup.
But if you did this completely through your PC, you should look at a program called EventGhost. I have this installed to perform PC functions at the same time as I do things with SmartThings. So, when I disable voice alerts (with a virtual switch) it also mutes my PC. When my office lights turn on, it activates my screensaver. You might be able to get it to work with whatever program you’re running on your pc to get the lights to turn on or off. There is a smartapp available to choose which devices report to EventGhost and how they should be structured.