mixed results...
the indicator warning lamps on the LDV are especially naff, and in pursuit of making them brighter I bought some LED ones, superbright have some high-intensity ones... got a full set of green, amber, and a blue (not super bright) for the main beam.
interesting results, though. The indicator ones work well and look brighter than the bulbs.
You can't change the no-charge one for an LED as the alternator then doesn't charge.
The ABS warning lamp and the handbrake/brake fail warning lamps don't go out properly with LEDs, so they have to stay with bulbs.
The main beam lamp is plenty bright, even with a "normal" as opposed to "bright" LED.
Still, I now have some spare ones to play with.