Choose the factory headlight system below to see the correct bulb and recommendation path for this 2015 Cadillac CTS.
Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.
Low beam
D1S
High beam
D1S
Factory setup
Body Style: coupe; Lighting: HID
Choose the factory system installed in this vehicle. Bulb sizes and recommendations change with that selection.
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.
Body Style: coupe; Lighting: HID
High/Low Beam Combined: D1S
Factory Xenon replacement
OSRAM Night Breaker 220
High/Low Beam Combined D1S
Estimated price$150
BulbFacts testedCorrect bulb size
Best Premium Output
The Night Breaker 220 is the premium pick when performance matters more than chasing the whitest possible color. It improves low and high beam output while keeping a warmer, weather-friendly stock-style tone.
Measured vs factory Xenon referenceMeasured test
Low beam+58% light
Reference 408 lux · Upgrade 645 lux
High beam+27% light
Reference 807 lux · Upgrade 1,028 lux
Color4,500K 100K cooler
Reference 4,400K · Upgrade 4,500K · 5000K pure white
The CBI-NG is the styling-friendly premium choice. It still performs well, but the main reason to buy it is the cleaner 5300K tone that gives factory HID headlights a more modern white look.
Measured vs factory Xenon referenceMeasured test
Low beam+25% light
Reference 408 lux · Upgrade 509 lux
High beam+15% light
Reference 807 lux · Upgrade 927 lux
Color5,300K 900K cooler
Reference 4,400K · Upgrade 5,300K · 5000K pure white
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
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.
Body Style: sedan
High/Low Beam Combined: D3S
Factory Xenon replacement
OSRAM Night Breaker 220
High/Low Beam Combined D3S
Estimated price$150
BulbFacts testedCorrect bulb size
Best Premium Output
The Night Breaker 220 is the premium pick when performance matters more than chasing the whitest possible color. It improves low and high beam output while keeping a warmer, weather-friendly stock-style tone.
Measured vs factory Xenon referenceMeasured test
Low beam+58% light
Reference 408 lux · Upgrade 645 lux
High beam+27% light
Reference 807 lux · Upgrade 1,028 lux
Color4,500K 100K cooler
Reference 4,400K · Upgrade 4,500K · 5000K pure white
The CBI-NG is the styling-friendly premium choice. It still performs well, but the main reason to buy it is the cleaner 5300K tone that gives factory HID headlights a more modern white look.
Measured vs factory Xenon referenceMeasured test
Low beam+25% light
Reference 408 lux · Upgrade 509 lux
High beam+15% light
Reference 807 lux · Upgrade 927 lux
Color5,300K 900K cooler
Reference 4,400K · Upgrade 5,300K · 5000K pure white
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
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.
Body Style: sedan; Lighting: HID
High/Low Beam Combined: D3S
Factory Xenon replacement
OSRAM Night Breaker 220
High/Low Beam Combined D3S
Estimated price$150
BulbFacts testedCorrect bulb size
Best Premium Output
The Night Breaker 220 is the premium pick when performance matters more than chasing the whitest possible color. It improves low and high beam output while keeping a warmer, weather-friendly stock-style tone.
Measured vs factory Xenon referenceMeasured test
Low beam+58% light
Reference 408 lux · Upgrade 645 lux
High beam+27% light
Reference 807 lux · Upgrade 1,028 lux
Color4,500K 100K cooler
Reference 4,400K · Upgrade 4,500K · 5000K pure white
The CBI-NG is the styling-friendly premium choice. It still performs well, but the main reason to buy it is the cleaner 5300K tone that gives factory HID headlights a more modern white look.
Measured vs factory Xenon referenceMeasured test
Low beam+25% light
Reference 408 lux · Upgrade 509 lux
High beam+15% light
Reference 807 lux · Upgrade 927 lux
Color5,300K 900K cooler
Reference 4,400K · Upgrade 5,300K · 5000K pure white
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.
