I will suggest from motorcycling experience that you will need a light at LEAST as powerful as a scooter headlight to snowboard with at night if the slope isn't lit up. Any lamp that fits on your head powered by a tiny battery won't cut it (unless they are hella bright, hella expensive LEDs).
It shoots 80 meters and in the store with the lights on you can clearly see it shining across the store. Seems like it will work well and if I really wanted to drop some cash they have ones that are as bright as a car headlight and shoot 200 meters but they are like $400. For $50 I'll try these and if they don't work well I have a headlamp that I can wear for other activities.
Also what does motorcycle experience have to do with riding on snow at night?