Ken at besthongkong.com has written to let me know about a new LED product offering. You can now buy extremely bright 5mm LEDs that are tailed and triple-wrapped in heat shrink tubing for a plug-and-play install in your vehicle (car, boat, motorcycle, snowmobile, X-wing fighter or whatever you drive). The proper current-limiting resistor is already installed.
What’s great about ordering these preassembled from Best Hong Kong is that you can order in as low a quantity as you like, since there’s not a minimum order. But quantity discounts kick in on orders as small as 10 pieces on this item. If you need a lot of LEDs in your vehicle, this is a huge timesaver–individually soldering and shrinkwrapping more than a couple LEDs gets old real quick, I can tell you from experience.
These are priced around a dollar each at quantity 1, but get cheaper quickly in quantity. Colors currently available are white, red, blue, green, and UV.