Honda 1998 Prelude Owner's Manual page 205

Lights
HORIZONTAL ADJUSTMENT
6. If either indicator is not aligned
with its "0" mark as described, an
adjustment can be made using a
Phillips-head screwdriver to
realign it with the "0" mark. Please
refer to the illustrations.
Maintenance
VERTICAL ADJUSTMENT
7. If you cannot get an indicator to
align, have your Honda dealer
inspect the vehicle for body
damage or suspension problems.
Replacing a Headlight Bulb
Your car has two bulbs on each side,
four in total. Make sure you are
replacing the bulb that is burned out.
Your car uses halogen headlight
bulbs. When replacing a bulb, handle
it by its plastic case and protect the
glass from contact with your skin or
hard objects. If you touch the glass,
clean it with denatured alcohol and a
clean cloth.
The headlight bulbs in your car are
H1 headlight bulbs for longer life.
We recommend the use of Genuine
Honda parts for replacing a
headlight bulb.
NOTICE
Halogen headlight bulbs get very hot
when lit. Oil, perspiration, or a scratch
on the glass can cause the bulb to
overheat and shatter.