Important Information Manual
For more information related to Philips LED range, please contact us www.philips.com/support or contact your local representative. 
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1.  General Information  ______________________________________________________________________  2 
1.1.  What is LED retrofit? For which applications? ___________________________________________________  2 
1.2.  What are the differences between Philips Ultinon LED and Philips X-tremeUltinon gen2 range? ___________  2 
1.1.  Why does the color temperature decrease from 6 500 K for the first generation of Philips X-tremeUltinon LED 
to 5 800 K for the second generation?  _____________________________________________________________  2 
1.3.  Why should I buy this product? ______________________________________________________________  3 
1.4.  How the lifetime of an LED is calculated?  ______________________________________________________  3 
1.5.  What’s the difference compared to the competitors?  ____________________________________________  3 
1.6.  What is the purpose of the control box? _______________________________________________________  3 
1.7.  What is generally the first failure point of an LED? _______________________________________________  4 
1.8.  Are Philips LED range environment friendly? ____________________________________________________  4 
1.2.  What is the difference between LED-FOG [≈H8/H11/H16] and LED-HL [≈H11] low beam? ________________  4 
1.9.  Can I save money by switching to LED? ________________________________________________________  4 
1.10. How would I recognize fake Philips LED bulbs from a genuine? _____________________________________  4 
1.11. How do I know if the Philips LED Retrofit is compatible with my headlamp? ___________________________  4 
1.12. What are the advantages of the Philips LED design? ______________________________________________  5 
1.13. What does CANbus adapter stand for? ________________________________________________________  5 
1.14. What does connector rings stand for? _________________________________________________________  5 
1.15. Is it mandatory to use an additional connector ring while fitting LED? ________________________________  5 
1.16. What are the meaning of AirFlux, AirCool, CeraLight and SafeBeam?  ________________________________  5 
2.  Technical questions _______________________________________________________________________  6 
2.1.  How can I verify which LED to use to replace my old bulb?  ________________________________________  6 
1.3.  How to make sure my car can be equipped with LED retrofit? ______________________________________  6 
1.4.  Is it mandatory to use a CANbus adapter while fitting LED? ________________________________________  6 
1.5.  What SMD or SMT means? __________________________________________________________________  6 
1.6.  Why most of the competitors are using Lumileds chips?  __________________________________________  7 
1.7.  Binning of the LED chips. How do we chose them to make sure that we have the same CCT for each PCB?  __  7 
1.8.  Why Philips LED don’t have integrated CANbus?  ________________________________________________  7 
1.9.  Is the 24V festoon equipped with CANbus? _____________________________________________________  7 
1.10. Is it possible to use the 21W CANbus for 24V LEDs? If yes, how many per lamps is required? _____________  7 
1.11. Does the CANbus removes the residual current at the time when the lamp goes off?  ___________________  7 
1.12. Does the progressive on/off of exterior lamps on certain vehicles remain after installing LEDs? ___________  8 
1.13. How does the beam geometry fit in comparison with a normal H4/H8/H11? __________________________  8 
1.14. On the driver box of the LED lamp it says: “Caution: Do not touch – Hot surface”. How hot will this become? Is 
it getting this hot that it can damage cables or any other car parts under the hood?  ________________________  8 
2.  During installation ________________________________________________________________________  8 
2.1.  After installing an LED light, would I get an error message on the dashboard? _________________________  8 
2.2.  What do happen if the blinkers fail?  __________________________________________________________  8 
2.3.  How do I replace the incandescent bulb with a LED bulb? Is it difficult?  ______________________________  8 
2.4.  The LED does not light up after installation. How can I resolve this issue? _____________________________  8 
2.5.  Which CANbus adapter do I need: 5W or 21W?  _________________________________________________  9 










