Basic Things to Know about LED Lamps
Performance is the result of 3 groups of components
Optical LED components
perceived to deliver the same or better light effect as the original light source
(beam shape, intensity, color point, color rendering),
and perceived as equal or better light quality - variation between lamps
Electrical LED components
need to be 100% compatible with the electrical input power characteristics
and 100% compatible with installed accessories (dimmers, transformers),
while causing no non-compliances.
Mechanical & thermal LED components
mechanical compatibility (shape, size) into an existing socket & fixture
and thermal compatibility into existing socket & fixture
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Components Drive Performance & Price
AL
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Color Binning
Metal Halide
• Each color consists of several different “bins”
• The performance of each LED is unique
• Each LED is binned by three measurements:
output
color
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power
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HPS
CIE Chromaticity Diagram
Binning
All LED Components In A Product Batch Are Different
Manufacturing
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Inspection & QC
Sorting a.k.a. Binning
Higher output bins cost more
Cool
Bins closer to the black body curve (“whiter”) cost more
Manufacturers will not sell you just one bin in large volumes
Manufacturers will not guarantee availability of specific bins
Warm
Low Output
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High Output
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Light Quality
LEDs and Standards
Methods for Achieving Good Quality Light
• Use only one LED bin
• LED Binning Algorithms
• Optical treatments to reduce variation
• Fixture Calibration
Binning Algorithm example
7 Step
McAdam
Ellipse
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4 Step
McAdam w/
Algorithm Page
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Light Quality
LEDs and Standards
Binning Algorithm example
Conforms to ANSI C78.377A
7 Step
McAdam
Ellipse
4 Step
McAdam w/
Algorithm
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Light Quality
Philips LEDs
Philips Optibin’s CCT and hue tolerances for LED’s fall within a 4-step
MacAdam ellipse , rather than 7-step ellipse defined by ANSI standard
Optibin dictates the use of LED’s from bins which lie close as possible
to the black-body curve within the 4-step ellipse. This proprietary algorithm
intelligently combines LED’s from different bins, guaranteeing color
uniformity for lamps purchased and shipped at different times
SDCM – Standard Deviation of Color Matching
A color difference of 1 SDCM “step” is not visible
2 – 4 “steps” is barely visible
5+ readily noticeable
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Color Consistency Across Fixtures
Binning Combined With Software Logarithms Improves Consistency
This is a Philips Exclusive
Optibin®
LED Manufacturer
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