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Originally Posted by particlewave

theretrofitsource is about the worst place to buy bulbs due to their high markup. Apparently, they also don't know what type of bulb 986/996 Litronics use.

The bulbs are D2S, not D1S.

HID bulbs are not high-tech anymore, so paying more than $10 per set is just foolish. Any aftermarket HID projectors likely run $10 bulbs (mine do) and they are very bright.

https://m.ebay.com/itm/2X-35W-D2S-D2R-D2C-Xenon-Car-Replacement-HID-Factory-Headlight-Light-Lamp-Bulbs/272394738179?hash=item3f6bfdda03:m:mCWDteAlJ8j6a-a092JLyng

If you must pay more to feel more secure, you could spend 4x-25x more, but there is no need. Try the $10 set above and see for yourself. Worst case, you're out $10.
Stick with 5000k or below unless you like purply-blue lights.

https://m.ebay.com/itm/USA-German-Genuine-Philips-D2S-Xenon-Bulbs-Part-85122-Free-Ship/122108639372?hash=item1c6e3df88c:g:59wAAOSwT5tWKWP s

Thanks for the recommendations!

I've read some good things about the Nightbreakers, would these be compatible?
https://www.ebay.de/itm/Osram-Xenarc-Night-Breaker-Unlimited-D2S-66240XNB-HCB-Autolampe-Duobox/282633959526?hash=item41ce4bf866:g:-xMAAOSwZFdafA7l

Or perhaps stick with something like this?
https://www.ebay.de/itm/OSRAM-D2S-66240CLC-Xenarc-CLASSIC-Xenon-Scheinwerfer-Lampe-ORIGINAL-NEU/382020321070?epid=1928330757&hash=item58f22f7f2e:m:mdbsAw9MHB-ewfvk7p4u_Vg