In Florida, whave always either used the GN gadget adapter(good for stalking or tree stands) or used a heat lamp clamp around the flashlight. (the kind you find at the feed store to keep the baby chicks warm).
Tighten the clamp which held the heat lamp around the flashlight barrel and clip that assembly to the tree stand, then shine it on the feeder.
Throw the heat lamp (sans clamp) away.
This year I found one of the hunters used a simple $20 clip-on white flashlight he purchased at Walmart. It was plenty bright enough, operated on 3 AAA batteries, and was highly adjustable.
Technique for night hunting hogs with bow and flashlight:
What I have found is that if the hogs are already
feeding before you turn on your light, it is imperative to point it up in the air, turn it on, then lower it slowly (as if turning up a dimmer switch) because a quick illumination or a rapidly moving (jiggling) light will spook them.
If you clip your fixed mount light to the stand or tree branch, it's best to turn it on before the hogs arrive, right at dusk, and do not move it.
The color does not seem to matter much...red, green, blue, or even white.
Motion of the light does matter so do it slooowly.
And if you are using a light in a ground blind, be sure the light is outside the blind or you will illuminate the interior, causing a stampede.
How do I know this?
Listening to a lot of hunters success and failure stories.
Night hunting for hogs is truly a blast!
Except for this year when trail cams showed the sneaky critters arriving somewhere between 9 PM and 3 AM.
It's tough to be out there during those hours.
I am partial to the Sniper Hog Lights brand of light.
Robert Pecht in Texas handles these and they are available on-line. Really good customer service.
I own three or four of his lights as once in awhile a hunter wants to borrow one.
One of these lights is about five years old and I needed a switch and an end cap.
Robert sent me two of each at no charge and no postage.
Illusive Wildlife makes them too, but I have seen more of these malfunction.