Below are the types and wattage of bulbs on the 2008 Scion xB. Please use care in replacing and do not use too high a wattage... Mishandling of bulbs can result in bursting, shattering, or shorter lifespan.

Headlights (low) - #9704 - 55W - H11 halogen bulbs
Headlights (high) - #9005 - 60W - HB3 halogen bulbs
Foglights - #9704 - 55W - H11 halogen bulbs
Front turn signal lights / parking lights - #1157NA - 27/8W - Single end bulbs (amber)
Front side marker lights -  - 5W - Wedge base bulbs
Side turn signal lights -  - 0.4W - LED
Rear turn signal lights - 7440 - 21W - Wedge base bulbs
Stop/tail lights and rear side marker lights - 7443 - 21/5W - Wedge base bulbs
Back-up lights - 7440 - 21W - Wedge base bulbs
High mounted stoplight -  - 3.6W - LED
License plate lights - 194 - 5W - Wedge base bulbs
Interior light - 28mm - 8W - Double end (Festoon) bulbs (30mm can fit)
Personal light - 194 - 8W - Wedge base bulbs
Luggage compartment light - 28mm - 5W - Double end (Festoon) bulbs (30mm can fit)

very good to know. i search for a while at SL before knowing which bulbs to buy for the license plate, front turn, and reverse lights

Can we please pin this (make a sticky topic) please? I found this to be super useful! This is what I had to go through to find it again:

I had to search forever to find this again

I started getting tired (12:22am)

Then I found it!
 
Only to find it here in Audio / Electronics, but way at the end
 

I did try the search option but the only key word I could think of was light and chart (which wasn't even a part of this) 

So, yeah, if we can stick this up it would be awesome!
 

Thanks! 

You're awesome, thanks!

sylvania.com also!

They are Neo Wedge Type B, and the center button lights are 3mm LEDs not PLCC-2