Measurements in Automotive Lighting

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Course content

Introduction
- Lumens, Lux, and Candela EXPLAINED
- Consistency in Measurement 10 xp
  - Quiz
Lumens
Intensity and Illumination
- Intensity (candela)
- Isocandela Chart
- Illumination (lux)
- Distance
- Isolux (Bird's Eye) Chart
- Intensity Quiz 10 xp
Efficiency and Power
- Optical Efficiency
- Power
- Efficiency Power Quiz 10 xp
Beam Pattern
- Beam Patterns
- Spread
- Gradient
- Blending
- Output Images
- Beam Pattern Quiz 10 xp
Color
- Color
- Color Quadrants
- CCT
- CCT and Chromaticity
- Color Precision
- CRI
- Color Quiz 10 xp
Scoring Systems
- Baja Designs ELS
- Consumer Reports
- IIHS
- Scoring Quiz 10 xp
Final Test
- Test Instructions
- Final Test

Intensity (candela)

What is it?

Intensity of light in a specific direction.
This is usually reported as the maximum point of intensity (peak intensity).
Some competitors say their lights are "brightest" because they have greater maximum intensity. This is not accurate. It would be more accurate to say they "shine the furthest" or have "more throw" or simply "greater intensity.“

How do we use it at Diode?

We report the peak intensity on all of our lamps.
Candela is used for all regulatory standards, to dictate how much light shine in specific directions.
Candela is not used for bulbs because bulbs do not shine light in a specific direction.