#Color2018
Illuminating Advancements in
LED Lighting
Implications for Organizational Change
James S. Summers Vice President
Just Normlicht, Inc.
Just Normlicht Worldwide manufacturer of
standardized lighting for controlled viewing and color matching environments Broad line of standard and
custom products
GL Optic (a JUST subsidiary)
Instruments and systems for quantified light measurements
From basic spectrometers to rack-mount lab equipment
Accessories extend applications, designed for accuracy, durability and ease of use
Software extends functionality, and integrates with a wide range of environments
Light…Matters Only three factors affect color Source Object Observer
You control two of them Light is one
Lost in Translation To speak clearly about color, we must use a
common light language Purpose first… Internal production workflow Graphic arts – ISO 3664:2009 (D50) Materials – ISO 3668 (usually D65)
End-use (customer) environment Often undefined, poorly defined, or unknown
Why LED Lighting? COST – in all forms Energy efficiency, carbon footprint Maintenance Toxicity Waste disposal
LEDs - in a state of flux
LEDs – fundamentally different How they make light What light they produce How light is emitted How they are “driven”
and controlled How they change
over time
Tungsten
Fluorescent
LED
LEDs – Efficiency Efficiency - Light vs. Heat
122 80 13 0 50 100 150
Light Output (lumens)
Energy Input
(1 watt)
LEDs – Emitted Light Narrow angle Changed by Optics, lenses Reflectors, diffusers
New lights don’t work in old fixtures
LED T8 tube lamp 1” (2.54cm) x 4’ (122cm)
LEDs key basic differences Efficiency Photometry – light distribution Spectral distribution and
resulting light quality Electrically Life cost of ownership So, the world is going LED…
Applications for LED Lighting What are the impacts of LED lighting? Manufacturer to consumer workflow Point of purchase/use Manufacturing workflows Purpose first… Internal production workflow Graphic arts – ISO 3664:2009 (D50) Materials – ISO 3668 (usually D65)
End-use (customer) environment Often undefined, poorly defined, or unknown
LEDs Equality? All LEDs are not created equal Customer’s environment Mixed light sources Undefined light sources Poor quality sources Different (than D50)
LED Lighting with Low CRI (left) and Higher CRI (right)
LEDs Equality? All LEDs are not created equal Production environment One source of ISO
compliant LED lighting No retrofit ISO tubes Ambient LED impact
LED Lighting with Low CRI (left) and Higher CRI (right)
LEDs for Color Critical Viewing Key obstacles
Large varianaces in chip peak wavelength
Thermal change = color change
Large production tolerances
Manual selection (binning)
Comparatively small demand
Availability, Servicability
Why CCT isn’t Enough CCT (correlated color temperature) Very rough definition of the white point Imprecise Only one metric Not part of the
ISO standard
‛System’ Tolerances Actual viewing conditions incorporate
all variables Ambient conditions Walls, surroundings Room lighting
Viewing geometry Observer height, sample angles Gloss, glare
Lighting fixture variables Mounting Tube tolerances, age and usage
Cumulative Errors Two different viewing conditions’ relative tolerance can
easily exceed recommended absolute tolerances
Tolerance for white point allows = 0.005 deviation Diameter = 0.010
Aim Point
Maximum Deviation
0.00 0.005+ 0.005-
Range >0.009
Your system
Customer’s system
Cumulative Errors Exacerbated when multiple print process/technologies,
different stocks and production locations are involved
Aim Point
Ink jet - 4 color stock with OBAs
Ink jet (8c)
Sheet-fed offset – 4 color, plus spot and varnish
Dry toner (4c)
Proof
Viewing Booth #1
Viewing Booth #2
LED D50 + Low CRI LED Ambient 25% ISO 3664 compliant Ambient Light LED 5000 Kelvin CRI 82
Mixed Light
5029K; ChErr = 0,000;Mivis = 0.7; Miuv = 0.7; CRI 97.5 5071K; ChErr = 0.008; Mivis = 1.9; Miuv = 5.2; CRI 81.5
+
5037K; ChErr = 0.002; Mivis = 0.7; Miuv = 1.6; CRI 94.4
LED D50 + High CRI LED Ambient 25% ISO 3664 compliant Ambient Light LED 5000 Kelvin CRI ≥92
Mixed Light
5029K; ChErr = 0,000;Mivis = 0.7; Miuv = 0.7; CRI 97.5 4945K; ChErr = 0.002; Mivis = 1.1; Miuv = 4.2; CRI 93.4
+
5012K; ChErr = 0.001; Mivis = 0.7; Miuv = 1.4; CRI 96.7
Why LEDs for Color Critical ISO compliant viewing?
1. Better color performance Versus the standards Between different fixtures (no profile chasing) Stability over time (no lamp aging)
2. Less Total Cost of Ownership No maintenance Less waste Longer life & ‘future proof’
3. No warm-up 4. No color shift on dimming
JUST LED Timeline
2008 2010 2012 2014 2016
Development multi-spectral LED technology
LED Viewing Light
LED Luminaire
LED Calibration Source
LED moduLight & proofStation
LED Production Lighting
LED Hybrid Luminaire
2018
Full LED Product Family
LED vs. Fluorescent Performance Chromaticity Error CRI Ra
R1-8 min.
MI(vis) < 1.0 MI(uv) < 1.5
FL LED ≤0.005± ≤0.000 >93 ≥97.5 ≥XX ≥96.5 <1.0 ≤0.5 <1.5 ≤0.6
ROI of LED for ISO Viewing
Annual Hours Usage 6,000 Tube Replacement Frequency 2,500 Tube Replacement Cost $ 156 Replacements per Year 2.4 Burdened Labor Rate $ 90 Replacement Labor Hrs. 1 Tube Overhead per Year $ 50 LED Rate Life 50,000 Depreciation Period 7 years
JUST LED moduLight Family Desktop to Harmony Rooms Exceeds ISO and Fogra standards 2017 InterTech award
JUST LED moduLight Family Both D50 and D65 illuminants Full digital dimming – no color shifts No change over time Instant on – no warm-up Switchable UV content ≥ 50,000 hr. life Glare and reflection free
Where LED Lighting is Heading Ubiquity – incandescent and fluorescent
lighting will be illegal Performance will improve More lumens per watt Better light quality More choices
Integrated, connected, ‛smart’