I went for a 'crystal clear' standard bulb from a Corsa to upgrade mine. This way they retain the ability to light up with the lower voltage with the sidelights on....... The bulbs had a blue tint to them to filter out the yellow light.
Been thinking about trying out an LED, but I have read stories of fuses blowing and the lights not working when the side lights are turned on.
Interested to hear if anyone else had tried this.