They had the lights on before, but not all over the whole mountain. Just in the Valley. Tonight though they have them on everywhere because I can see the lights at the top from my house.
When they first put them on they go around clean the nozzles on the snowguns, check the lights, and maybe test out some guns. I don't think they will blow tonight (unless just testing out the guns), but by all means, not start making the base. Its cold tonight and tomorrow night and then it gets too warm for a little bit. It would just be a complete waste of money to start making the base now.
Rest assured they will begin soon enough, and its just enough to get me psyched. It would be nice to see snow on the cam tomorrow though