Big dump of them, from scrapped decorations. Looks like a cutting torch was used on these so some of the strips are burned, and they've also been randomly cut, but spot checks with live 12V voltmeter probes into the wee internal contact pad things suggest most of them work, which is quite a lot more than I'm likely to be able to use.
I'm thinking I can use them for car interior light, inspection and test lights, and maybe to supplement (or replace? dunno if they're bright enough) sidelights and indicators. Dunno yet how much current they draw but I assume if I dont use too many (say six) I could just parallel off the existing light circuits.
Any snags that I'm too blinded to see?