I installed the LEDs: new generation plug-in design with flexible ribbon heat sinks and 40W/ 4800 Lumens each. Same radiation pattern as the xenons, nice straight cut line. Everything fit inside the headlight assembly. Needless to say that the difference from the old xenons is like night and day. Last fall I barely avoided a black cow who materialized in front of me on a dark night...
The warning light is triggered when the current drawn by the lamp falls below a threshold (which I was hoping someone had figured out how to re-code) A generic H7 is 55W, so at 40W I'm not far off. When in DRL mode, when the lamps are powered at lower current, there is no warning, but it turned on for a few days at night. Now it stopped. I am probably just somewhere at the borderline.
I can live with that for now, as during the night I can get a visual check that my headlights are working or not, and during the day I will find out if any other lamps in the car are defective.
If I'll want to fix it permanently, I will install, instead of silly resistors, 18W LED light bars on each sides of my winch, and connected in parallel with the low beams.