Apke Hunter,
Check out HuntSports.com online. He talks about lights for hunting at night and of animals getting used to them. The problem I see with that, however, is that of battery drain. A few lights that illuminate well enough to see will drain a battery pretty quickly, so a large amp battery is needed and a source to recharge it if the lights will burn every night, all night, such as a solar panel.
A lot of guys use red lens lights to illuminate the area when an animal is present, and they have good results with that. For me, I keep thinking I want to be less intimidating to the coyotes and not put lights on them and perhaps have them get away or maybe wound one.
My outfit for now at least is night vision. I have a light setup but turn it on and off as needed. The light is not visible to the eye. A small gel cell battery will power the lights very well before needing a recharge since I only use them when needed. Time will tell if it will work well.
I like the idea of having lights come on at night via photo cell and remain on all night, and charge by day with a solar panel. The only problem with that is cost. A solar panel powerful enough to make that happen is not cheap, and a large amp battery would be needed, again not cheap. However, given those two items combined with good lights, it should produce good light necessary for making good shots.
I heard recently of one guy who baits underneath a street light and he has taken several coyotes. So, I guess animals do get used to the lights over time and don't pay much attention to them. Where I hunt on the family farm, there is no electricity, so everything has to be powered by battery.