I replaced mine gauge bulbs with LEDs from superbrightLEDs. https://www.superbrightleds.com/cat/ba9s-ba7s/ . Big improvement.
it was nice to order the led bulb color to match each of the gauges warning light color- red, green, blue... all lights now clearly visible in bright direct sunlight.
I personally kept the background lights incandescent... the bulb heat helped keep my gauges from fogging up during winter driving/ cold morning driving.
I would suggest you physically check the size of your bulbs before you order. 0n my 356 original and Chinese repo gauges, some were B7 other B9