When there is movement in the hall, AND it's dark enough (input from LDR) i wan't to turn on the lights for a couple of minutes. (some kind of follow-me lightning).
I figured out that i need virtual devices in homeseer, but i have no clue how to combine the different triggers (motion + darkness).
So in short, I need some help

The roomboard flips between Move en noMV.
The light sensor has a range from 0 (light) to 255 (dark)
I created a Virtual device (motion_hall) which is turned on when there is motion. But how can i implement the light level to turn on the lights.