Hope this helps
i change my interior to white led and changed my door and rear hatch light to blue, it just look cooler than regular bulb
you van buy for all interior in ebay for about $30
below is a list of all bulbs in Mazda cx-9 from sylvania website
2010 MAZDA CX-9 (With halogen capsule headlamps)
Low beam headlamp
H11 COOL 6,000-8,000
High beam headlamp
9005 COOL 6,000-8,000
Parking light
2825
Front turn signal
992 (7440A)
Rear turn signal
992 (7440A)
Fog/Driving light
9006
License plate
2825 8K
Back up light
7440
Front sidemarker
2827
Rear sidemarker
2825
Map light
DE3175
Dome light
DE3175
Step/Courtesy light - DONE
2825
Trunk/Cargo area DONE
DE3175
