Factory headlight setup not identified

1998 Cadillac DeVille Headlight Bulbs & Lighting Guide

Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 1998 Cadillac DeVille.

Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.

Low beam
9006 / HB4
High beam
9005 / HB3
Factory setup
Factory headlight setup not identified
Representative car or sedan image for 1998 Cadillac DeVille
Representative car or sedan image

Best headlight upgrades

These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.

Factory headlight setup not identified

Low Beam: 9006 / HB4 · High Beam: 9005 / HB3

OSRAM Night Breaker 200 manufacturer product image
Best direct replacement

OSRAM Night Breaker 200

Low Beam 9006 / HB4 · High Beam 9005 / HB3

Estimated price$20-34
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade

The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.

Measured vs stock halogenReflector test
Low beam+44% light
Stock 373 lux · Upgrade 536 lux
High beam+50% light
Stock 876 lux · Upgrade 1,312 lux
Color3,550K 125K cooler
Stock 3,425K · Upgrade 3,550K · 5000K pure white
General BulbFacts housing test
Read BulbFacts reviewCompare test resultsBuy at eBay
Morimoto 2Stroke 4.0 manufacturer product image
Best reflector LED upgrade

Morimoto 2Stroke 4.0

Low Beam 9006 / HB4 · High Beam 9005 / HB3

Estimated price$178
BulbFacts testedCorrect bulb sizereflector housing only
Safest Glare + DRL Pick

The glare-control recommendation for reflector housings, and also the easiest pick when your vehicle needs an LED that can properly dim for DRL use.

Measured vs stock halogenReflector test
Low beam+138% light
Stock 373 lux · Upgrade 889 lux
High beam+114% light
Stock 876 lux · Upgrade 1,872 lux
Color5,250K 1,825K cooler
Stock 3,425K · Upgrade 5,250K · 5000K pure white
General BulbFacts reflector test
Read BulbFacts reviewCompare test resultsBuy at BRI Source
Morimoto XB Elite 2.0 manufacturer product image
Best projector HID upgrade

Morimoto XB Elite 2.0

Low Beam 9006 / HB4 · High Beam 9005 / HB3

Estimated price$311
BulbFacts testedCorrect bulb sizeprojector housing only
Best Premium Distance

The Morimoto XB Elite remains the premium performance benchmark from the current HID recommendations. It tested as one of the strongest 35W projector-focused HID kits and is the better fit when you want a complete, higher-quality conversion kit instead of a generic marketplace option.

Measured vs stock halogenProjector test
Low beam+95% light
Stock 284 lux · Upgrade 554 lux
High beam+230% light
Stock 935 lux · Upgrade 3,088 lux
Color5,000K 1,575K cooler
Stock 3,425K · Upgrade 5,000K · 5000K pure white
General BulbFacts projector test
Read BulbFacts reviewCompare test resultsBuy at BRI Source

A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation. Use the LED upgrade path only with a reflector housing and confirm beam pattern and glare after installation. Use the HID upgrade path only with a projector housing; it is not a reflector-housing recommendation.

Other bulbs

Available exterior and interior lighting data for this model year.

Ashtray Light
161Verify installed bulb
Automatic Transmission Indicator
161Verify installed bulb
Cargo / Trunk Light
561Verify installed bulb
Center High Mount Stop Light
1156Verify installed bulb
Check Engine Indicator
194Verify installed bulb
Cornering Light
3156Verify installed bulb
Engine Compartment Light
561Verify installed bulb
Fog Light
893Verify installed bulb
Front Side Marker
194Verify installed bulb
Front Turn Signal
3157AVerify installed bulb
Glove Box Light
194Verify installed bulb
High Beam Indicator
161Verify installed bulb
License Plate Light
194Verify installed bulb
Map Light
168Verify installed bulb
Parking Light
3157AVerify installed bulb
Parking Brake Indicator
194Verify installed bulb
Rear Side Marker
194Verify installed bulb
Rear Turn Signal
3157Verify installed bulb
Reverse Light
2057Verify installed bulb
Turn Signal Indicator
194Verify installed bulb
Vanity Mirror Light
DE3175Verify installed bulb
Technical details and sources

Confirm the installed bulb, connector, housing, and factory system before ordering.

PositionBulb or systemFitment status
Low BeamFactory system not specified9006 / HB4Bulb size confirmed
High BeamFactory system not specified9005 / HB3Bulb size confirmed

Each model year opens its own BulbFacts record. Bulb sizes and factory systems are not carried over from adjacent years.

Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.