I got them (and that gif) from autolumination dot com.
They are bright as all hell. But they don't fit. At 59 mm in length, they are just a few mm too long for the OEM LED tail light housing. But after you pull off the lens, you gain a few mm:
And with a little grinding,
you can get the metal lip off the one side, and shave the plastic so that the bulb sits further down inside the connector:
I'm not going to lie to you, I'm a little embarrassed at how bad this looks, what with the exposed wires. If I were less lazy, I might have siliconed the hole where I chewed through the bulb seat. But it stays pretty dry in the lamp housing, and in any case there's an electrical connector right there anyway.
End result: now I have bright, omnidirectional, high-powered amber LEDs in my rear tails, with no errors! What do you think?
As far as the fogs, have you seen these?
bulbs do sit properly, but yeah they'll wiggle a bit because I chewed away all the structural integrity at the base. But, I can insert and remove the modified bulb without any special effort
really the point is you could do this with any LED bulb, as cleanly as you want. lots of folks want to use different bulbs that don't fit in our small housings, so that's why I wanted to share this crude method with the forum
2011 4-door Golf TDI (5/11 build date)
Mods: Euro switch, LED tails, VAG'd stuff