those are nice...i use these..if it takes 4 aaa,you can solder a wire to a 6volt gel battery...for 30 dollars they make a nice backup also.
the switch is on the light,and it has a flood that works like a dimmer,and actualy i think it works better than my nightlight,because the spot is big,and it doesnt just dim right around the yote which limits the shot,this puts out a big dim spot,,also it seems that what i and my friends seem to see is,if you light up the surroundings of a yote and it is a confined spot i think they notice the movement from the vegitation close to it,i can be on flood in half a second,and i have a 40 foot wide dim circle,that goes a long ways..
i make a 4 inch shroud that slides on the light,and my smartlight red cover fits right over it.
http://www.camping-gear-outlet.com/camping-gear-17099.html