Exterior lighting covers every LED on the outside of the vehicle: headlights, tail and brake lights, turn indicators, daytime running lights and illuminated trim or emblems. These assemblies often combine many LEDs across several functions, and each one is typically matched to a defined color and intensity specification before the product leaves the factory.
Exterior lighting is one of the most visible parts of a vehicle and one of the most heavily regulated. A mismatched headlight cluster or an out-of-tolerance indicator is obvious to a driver on sight and may also fall outside regulation limits. A variation that is subtle in a single LED can become clearly visible once the whole headlight is lit, and a value outside the permitted range can present a compliance concern rather than just a cosmetic one.
Feasa products can test automotive exterior lighting products at multiple points throughout the production process — from LEDs on PCBs through fully assembled parts to laboratory measurements. Where absolute, traceable characterization is needed, the Feasa LED Spectrometer can also provide a reference for the Feasa LED Analysers or deliver high-accuracy measurements directly in the production environment.
Find defects before customers do
A fault found at build costs far less than a return, recall or field repair
Protect brand reputation
A lighting defect that reaches the field reflects directly on the brand
Product consistency
Output should look the same from one unit to the next, and across a product range
Compliance
Specified and regulated products benefit from a documented result behind every unit
Objective, repeatable results
A measured value removes the subjectivity of a visual inspection
Keep pace with production
Fast, multichannel testing fits the line without becoming a bottleneck
Color & intensity testing
Confirms LEDs match one another and stay consistent from one unit to the next
CCT & chromaticity measurement
Reports color temperature and CIE coordinates for every LED
Fast test times
Every LED read in a single cycle, in-line or off-line
Sequence & pattern characterization
Profiles blinking, sweeping or animated LED sequences over time
Data logging & results output
Every reading captured and exported for records and analysis
Traceable, absolute measurement options
Full-spectrum color and wavelength from the Feasa LED Spectrometer, on its own or as a reference for the Feasa LED Analysers
Instruments built for exterior lighting
Click any card to view the full product page.
High Brightness LED AnalyserFor high-intensity LEDs such as headlights & beacons.
Learn more →
RGB LED AnalyserPurpose-built for RGB LEDs & backlit panels.
Learn more →- Functional LED Analyser
Multichannel color & intensity testing for production lines.
Learn more → 
Low Light LED AnalyserFor low-intensity LEDs and backlit switches.
Learn more →
Legend SystemHub & satellite architecture testing up to 160 LEDs.
Learn more →- Life Tester LED Analyser
High & low temperature life testing, -65°C to 125°C.
Learn more →
Common exterior lighting test scenarios
A closer look at how Feasa systems are applied to specific exterior lighting measurement challenges.
Testing headlight module color and intensity
Each function — low beam, high beam and cornering — is captured for CIE 1931 (x,y) and intensity, among other parameters, in a single acquisition.
Values are output via log file or the Feasa DLL. The customer compares them to their own reference values.
Verifying tail and brake lights
(x,y) chromaticity, intensity and wavelength are captured per LED. Values are output for every part.
The customer applies their own limits — for example ECE red and amber regions — to the logged data.
Characterizing the sequential-indicator sweep
Segments are captured in rapid succession, giving an output profile over time.
From this the customer can assess firing order and timing. The same method tests blinking LEDs, with frequency and duty-cycle output and a pattern-recognition feature.