Yeesh...those look really weird and sketchy. I would much rather have the look of a stock sealed beam but with a nice, bright and white light. The JW's just look like a heat score.
I do not trust circuit breakers. having used them in car audio applications, I have personally witnessed them melting and/or catching on fire under consistent and reasonable draw. I will be fusing the wiring for safety. And of course keep a few around as spares.