[mcrews]

Originally Posted by topcat

To get a replacement technology for a filament, the light emitting area&volume of the new technology needs to match that of the old filament.
This is reasonably feasible with an arc (HID).
In my view, multiple LEDs spaced apart are never going to match a filament correctly - especially single-sided LEDs which can only emit from one face.

For this reason, LED headlights need to be fitted to a projector designed from scratch for LEDs (IMHO).

exactly!!!!!