@Harald_B I bought a Samsung Smartthings motion sensor to do what you are describing. However you have to have the TP-Link SR20 smart home router or a Deco M9 with a smart router built in. 

It been a while since I've looked but I do not believe you can get it to work with IFTTT. 

Ryan

@Harald_B the 30% idea got me thinking about doing something similar. I assume you have a dimmable light fixture that you are trying to control like this right? With a HS220?  

I'm wondering if you can pair a TPlink bulb with a HS200 switch and set up a rule that if you turn on the switch in the middle of the night it only turns on at 30%. Or take it a step further and add that sensor so if there is motion in the middle of the night turn on at 30%.  This is cool. 

My wife will make fun of me so hard!  

Ryan