I have the same fear, and did a little research........at night no less with the blinds open and closed too.....and oh yeah, the tents was open too,......... from 50 m away I can see a pink light/hue in the window with the MarsHydro and similar lights. With the 2 x HS1 you can see light, but no pink hue so that wouldn't be "mistaken" for a felonious moonshine me thinks......but better safe than sorry....
If I have to open the tents after sunset and before sunrise, I switch on the normal ceiling lights, and that mask the LED hue completely when viewed from outside.