I've always wanted under hood lights. 20 years ago I thought about wiring up my own led string under the hood, but I shy'd away because of a lack of experience with soldering, circuits, etc. Now you can simply buy a strip that's already built and ready to go, so I decided I had no excuse not to try. There are sooo many choices on eBay and Amazon, it's a little overwhelming. I decided to go for one of the more pricey versions hoping it would be worth it and besides it came with the wire and pin switch. Here is what I got:
https://www.ebay.com/itm/Underhood-LED-Light-Kit-w-Hood-Switch-Size-and-Color-Options-Available/291157773341?ssPageName=STRK%3AMEBIDX%3AIT&var=590308031148&_trksid=p2057872.m2749.l2649
The ad claimed they lights were water and ice proof, sealed in a silicone coating. Ends sealed with marine grade heat shrink. 3M adhesive backing. I bought the 24" version of high intensity white. It has a 10' 20awg black wire and a small hood pin switch. The only thing I needed was more zip ties and a washer.
Here is a before pic of the engine bay, in my garage, with the light on.
I decided to mount it in front of the weatherstripping because it shined in my eyes less, although you'd really be looking down most of the time so who cares. It might have been protected more behind the weather stripping, but I went for it anyway. I drilled a small hole in the underside of the hood and fished the wire back to the rear corner. I pulled the wire through a little fast and it got in a little bit of a bind, but worked out ok.
Next I used an existing hole to mount the hood pin by the battery since the positive would be headed that way anyway. I didn't have a power distribution block and I figured something this small didn't need a fuse. I ended up running the positive wire to the fuse box behind the battery. The negative side went to the pin switch. Easiest wire job ever. From there it was just a matter of zip tying up the wire.
For less than $20 it is an easy and awesome mod.
And the final result is: