Ask DFG about hunting, fishing and wildlife conservation
If you want to view wildlife at night with lights, leave your guns and bows (or anything that can be used to take game) at home and be aware that if you are observed shining a light, you will be stopped by law enforcement and questioned about your activity. You should realize too that this stop may be done at gunpoint and your vehicle will be searched for weapons, as spotlighting is considered a high-risk crime.
http://californiaoutdoors.wordpress.com/2009/09/