1. W. Schlager (representing GTB WG Light Sources)
Prep slides GRE TF
W. Schlager
(representing GTB WG Light Sources)

2. 5.1 Substitutes and Retrofits
Current status-quo - unregulated:
Only non-approved light sources available to consumer
Strong market demand for LED technology in the aftermarket
RISK: traffic safety (wrong colour, unsafe photometry, etc)
Substitute is the solution in a “dual-approved” device mounted in a Substitute-approved vehicle
“Dual” = homologated with Filament and Substitute light source
Substitute can replace filament light source without any additional measures and vice versa ( equivalent light performance  safe performance)
RISK: mis-use in non-approved vehicles
Solutions: marking, colour coded keying, …
Retrofit is the solution in a “filament-only-approved” device mounted in a filament-only- approved vehicle
Retrofit can replace filament light source ( equivalent light performance  safe performance)
RISK: it may not function in some specific situations
OBD, respectively failure detection system, if present
Dimmed dual-function use of light source (e.g. Front Position/DRL)
Extensive heat via halogen heat source near-by (e.g. right above LB)
Solution: marking, user information, positive list, regulated failure detection …
Both, Substitutes and Retrofits fulfill the equivalence criteria

3. 7.3 Confidence-building measures
“Equivalence Criteria” are a strong tool to ensure safe photometric performance and provide high level of confidence
what additional measures are needed?

4. The “Equivalence Principle”
… and testing at elevated ambient temperature !

5. The outcome of all considerations
Parameter
R37 info
Solution
on-top-measure
remark
cap
yes
same x
max. outline
el . connector
test voltage
lum. Flux
color
LCL
Intensity distr.
no, implicitly given
min/max specs defined for all relevant directions
LEA box
similar, min. light from box
LEA homogen.
similar, min. homogen. in box
el. Power max.
<1/3 of R37 value, plus fix max. current
min-max range plus failure-max. current enables safe tuning of vehicle system
- technology benefit of LEDs ! - 1/3 power leads to same cap temp.
el. Power min.
fix min. current
failure behavior
fix max. current in failure case
min. voltage range
min. flux at 9V-drop defined
exclude the dimming use in dual-functions
spectral content
limit white to <=3000K
 Note: 3000K limit basically only needed for categories, which COULD be mounted in red/amber functions
thermal behaviour
n.a.
- 1min/30min spec - test at elevated amb. T
exclude the use right above HP-Halogen
thermal topic is relevant for LEDs

6. Slides with details following …

7. To develop a new category sheet for a R128 substitute / retrofit
Measure filament lamps (R37)
Analyze R37 category sheet
Define equivalence requirements (R128)
Submit equivalence report
Additional:
Measure in luminaire(s)? – what is the target?

8. Far-field: emission characteristic

9. Near-field: Lum. Flux out of box

10. Near-field: homogeneity over box

11. Thermal situation at the cap

12. Spectral Power Distribution of “white”
Red filter  mainly flux decrease
Amber filter  mainly color shift