FDrive A GUIDE TO RING AUTOMOTIVE HID BULBS | Page 4

TYPES OF XENON
HID BULBS
There are currently 4 types of Xenon HID bulbs;
D1, D2, D3 and D4. They have a suffix of either R or S ie D1R or D1S. Bulbs
with the suffix R are designed to work in Complex Surface Reflector headlamp
units. Bulbs with the suffix S are designed to work in Projector headlamps.
All Xenon HID bulbs must be fitted with a direct replacement. So, if you
remove a D2R Xenon HID bulb then it must be replaced with a D2R Xenon
HID bulb.
D3 and D4 bulbs are more recent additions to the range and are designed to
work with new compact ballasts. They are mercury free, so have better
eco-friendly credentials. They also have a lower operating voltage – 42v AC.
COMPLEX SURFACE
REFLECTOR HEADLAMPS

PROJECTOR HEADLAMPS
LENS

REFLECTOR
(MULTIPLE MIRRORS)

REFLECTOR (ELLIPTICAL)
BULB

SHIELD

BULB

BEAM PATTERN

R bulbs can
be easily
identified
by the black
shield on
the glass.

S bulbs have
a clear glass

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Ring HID Bulb A4 12pp Guide.indd 3

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