I have not seen red in person, so I'm not sure how bright yet. picture this though: you are lighting the ground up to see where your tires are and what obstacle is there. For this use, I would personally want the most natural/ white lighting available as that will be easiest on the eyes. having other colors, IMO, may cause more strain to see those objects when it's clear out. now in dust, fog, snow, other colors may work better...kind of like amber drive lights for fog vs clear/ white does.
If you guys want red, lmk and I will bring some in for you and can have them built asap.
The Magnet: the magnet is strong, however if you fling mud, rocks, etc, it could get knocked loose. For this reason, ORO includes a self tapping screw with a pre-drilled/ sealed hole. so you can secure these things like they should. The cases on these lights are tough, sealed, and can be used pretyy much wherever. I would keep them away from your exhaust for sure though! You can still melt wires!!! I'm not sure if mounting inside the wheelwell would work well or not. If you drive through mud, that's usually where it sticks. I think no matter where you mount them, you will end up having to clean them up when using. tuck them up higher than the frame would be best.
Placement: That is going to be a little different front each truck to each owner's preference.
On mine, i am going to run 6 total to start/ maybe 8. I'm bringing in some extra lights in pairs also. you run them in series with the waterproof connectors. you need to use a heatgun or flamless torch to heat them up. the connectors will not seal up all the way with a hairdryer like shrink tape does. Placing them to light up each wheel is ideal in my mind. I'm thinking 2 in front of the front axle, 2 about 2ft behind the rear axle, 2 in front of the rear axle. the optional 2 I may place behind the rear axle for overkill. I'm also going to put one under the hood, since the JK does not have a light there.
They just wire in series and than to your switch. than you run your switch to + - and fused power if you want them to run only when the truck is on.