There isn't as much support for the jetta as the golfs. Your best bang for the buck might be the LED bulbs meant for reflector housings that deautokey sells. I never could find decent projector housings, and haven't set aside time or a budget to retrofit real projectors. Philips H7XV would be another great budget-minded bulb replacement. To ensure the longest life possible, clean the glass of the bulb with alcohol, acetone, or any other pure solvent to get rid of oils. I wear latex or nitrile gloves when handling them(and clean the gloves too). I wouldn't run anything hotter, as the wiring harness could overheat. I'm not a big fan of all of the teenagers driving around glaring everyone with HIDs or LEDs in reflector housings instead of proper projectors. What good is more light if it's not put down on the road anyway.
Check out
https://bulbfacts.com/halogen-bulbs/chart/