Lighting for Training Acc/Sh. Speed at Night

What kind of lighting methods are members using when track work is restricted to night time at a track with no lights???

Is it very difficult? Not worth the effort? Dangerous?

I have never seen a track that is totally dark. There are usually some lights within 100m or so of the track (or ambient town/city lighting). If it is pitch black you can get rechargeable camper lanterns at Walmart.

leave ur car lights on.