My "new" '74 Duster- or why I need a project like a hole in the head

Jarlaxle said
Do you have any hard data about any of the LED headlights?

Yes. Most of it is not released for publishing (and I like to buy groceries and stuff, so it's best if I don't lose my job by violating confidence), so I do my best to summarise it helpfully when questions like this come up.