Roc,
With respect to using the puck lights in the engine compartment I may have a suggestion. Once you decide where you want the light(s) in the engine compartment, I would stick a piece of (hook and loop type) Velcro in those places. Then stick a piece of the reverse kind behind the puck light(s). And you are done.
If you keep the light(s) in a handy place where you can find them easily, all you would need to do is stick them there when you need them and take them out after you are done.
That should help with the concern of having to keep them all the time in the heated engine compartment. Another advantage would be that you can unstick them from one place or another and make do with one or two lights instead of a couple. The Velcro should handle the heated environment alright.
Just a thought.
With respect to using the puck lights in the engine compartment I may have a suggestion. Once you decide where you want the light(s) in the engine compartment, I would stick a piece of (hook and loop type) Velcro in those places. Then stick a piece of the reverse kind behind the puck light(s). And you are done.
If you keep the light(s) in a handy place where you can find them easily, all you would need to do is stick them there when you need them and take them out after you are done.
That should help with the concern of having to keep them all the time in the heated engine compartment. Another advantage would be that you can unstick them from one place or another and make do with one or two lights instead of a couple. The Velcro should handle the heated environment alright.
Just a thought.