I have used the camera trap over several nights now - but see no "red glow" so I think it is passive - have set the date and time stamp and worked out a rough time that brock visits.
Last night I sat up in our bathroom and waited ... lots of snuffly eating noises from behind the tree (baited with peanuts) then - out walks Brock!
My first successful badger watching live event and from the comfort of my own bathroom!
I also found that Brock is not bothered by lights and he went about his business quite happily even when I shone the torch on him for a better view
My wife and I watched him for a few minutes as he searched the garden for food (spending time under each bird-feeder...) then left him to it