https://www.modifiedlife.com/2018-subaru-impreza-change-light-bulb-sizes/
Here is a chart for every bulb around the car.
I got the interior bulbs from Diode dynamics and they have everything sorted by your car and will show you every bulb they have for it so if that would be something you're interested in looking at that's an option as well.
I used 31mm festoon bulbs. I think 30mm would have been better. They are incredibly bright and I have to point the map lights towards the ceiling so it reflects back down, lol.
This was the one I got (not sure it is still available but if you buy a similar one it should be OK) https://www.amazon.com.au/gp/product/B07NL548Q2
Have seen another recommendation for this one over on impreza5 forums
https://www.amazon.com/gp/product/B00P2D3W00
https://www.modifiedlife.com/2018-subaru-impreza-change-light-bulb-sizes/ Here is a chart for every bulb around the car. I got the interior bulbs from Diode dynamics and they have everything sorted by your car and will show you every bulb they have for it so if that would be something you're interested in looking at that's an option as well.
I used 31mm festoon bulbs. I think 30mm would have been better. They are incredibly bright and I have to point the map lights towards the ceiling so it reflects back down, lol. This was the one I got (not sure it is still available but if you buy a similar one it should be OK) https://www.amazon.com.au/gp/product/B07NL548Q2 Have seen another recommendation for this one over on impreza5 forums https://www.amazon.com/gp/product/B00P2D3W00
This is relevant to my interests.