here's some junk i found as i was thumbing through the bosch books again.
one of these days, i'm gonna go out to the bus and see what wattage each
of the little bulbs are (i know the headlights are supposed to be 55/60W,
but what about the little side-marker lights and interior lights? i recall
that they have it marked on the bulb, but i never paid much attention before).

sources:
B1 - Automotive Electric/Electronic Systems
     Robert Bosch GmbH, 1988
     available from Robert Bentley Publishers

B2 - Automotive Handbook (1st English Edition)
     Robert Bosch GmbH, 1976
     available from ?? (used to be from Classic Motorbooks)

B3 - Automotive Handbook (3st English Edition)
     Robert Bosch GmbH, 1993
     available from Robert Bentley Publishers

------------------------------------------------------------------------
Consumer                     Average Watts Consumed
  Continuous Usage               B1              B2             B3
    Ignition                     20W             20W            40W
    Electric Fuel Pump           50-70W          -              -
    Electronic Fuel Injection    70-100W         -              -
  Prolonged Usage
    Car Radio (not custom)       10-15W          10-15W         10W
    Instrument Panel Lamps       2W each         2W each        -
    License-plate Lamp(s)        10W each        10W each       10W
    Tail Lamps                   5W each         5W each        -
    License-Plate & Tail Lamps   -               -              25W
    Side Marker Lamps            4W each         4W each        7W
    Parking Lamp                 3-5W each       3-5W each      -
    Headlights, lower beam       55W each        55W each       90W
    Headlights, upper beam       60W each        60W each       -
    Vehicle heater               20-60W          20-60W         50W
  Brief Usage
    Turn-Signal Lamps            21W each        21W each       6W
    Stop Lamps                   18-21W each     18W each       11W
    Interior Lamps               5W              5W each        5W
    Power Windows                150W            -              -
    Electric Radiator Fan        200W            -              25W
    Blower Fan Heat/Cool         80W             80W            -
    Heated Rear Window           120W            120W           34W
    Rear Window Wiper            30-65W          -              -
    Horns and Fanfares           25-40W each     25-40W each    -
    Electric Antenna             60W             -              -
    Fog Lamps                    35-55W each     35W each       20W
    Fog Warning Lamp (rear)      -               35W            2W
    Backup Lamp                  21-25W          -              -
    Windshield Wipers            60-90W          90W            5W
    Starter Motor for            800-3000W       800-3000W      -
      Passenger cars
    Wash-Wipe system for         60W             -              -
      Headlamps
    Cigarette Lighter            100W            100W           -
    Auxiliary Driving Lamps      55W each        -              -
    Supplementary Brake Lights   21W each        -              -
    Glow Plugs for Starting      100W each       100W each      -
      (for Diesel cars only)