Deer spotting is just about as common as deer hunting here in Pa. Its nothing to see 3 or 4 cars out during the summer months, but you cant spot after 11pm, and shining livestock is considered harassment also no weapons in vehicle. butas far as 60x 3 mil candlepower, i would personally not use this light too much. You will get maybe 30 minutes continuous burn time i get 40 some on a 2 mil and a little under an hour on a mil. also it have seemed to me that even with a red cover the more powerful lights still seem to make critters skittish. My new favorite light setup has become a 4 hundered thousand candle power red light and a mil amber cordless for the shot. the small red light burns for a good while and wont spook game . They dont care for the amber light, but theyll usually stick around long enough for a shot. ps you can buy a 2 pack of lenses red and amber in cablelas for around 5 bucks. also another option is to pick up a 6 volt portable battery charger, only a few pounds, and they have a cigarette adapter , so you can plug in a corded spotlight like the 400,000 one. thats all i can tell ya man, hope it helps