Technical specs

Report
Key criteria for selecting an
LED solution
Marco Wendling
Lietcorp GmbH
Selecting an LED
based solution…
Brand
Product features
A new and sometimes large selection…
Known brands (selection)
Emerging brands (selection)
LIETCORP
+
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•
•
•
Known brands
Wide range
Lighting expertise
Reliability
International presence
Emerging brands
•
•
•
•
•
Focus on niche
Electronic expertise
Creative
Flexible
Dedicated
!
•
•
•
•
+
!
Flexibility
Business model
Pricing
Dedication
•
•
•
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Limited portfolio
Capacity
Reliability
Sustainability
Select by company size or level of awareness is not a guarantee of success
It is above all the feature/requirement/trust ratio which premium
Product features
• Technical specs
• Quality – Safety - Warranty
• Price
Product features: technical specs
Technical specs to consider
• Efficacy (lm/W)
• Colour temperature (K)
• Colour rendering (CRI)
• Binning
• Lifetime <-> Thermo-management
• Glare
Technical specs: initial vs final efficacy
Fitting
Indutrial MB
T5 fluorescent
Indutrial MB
HID
Indutrial MB
HPS
Indutrial MB
LED
Power light source
2x80 W
250 W
250 W
100 W
CCT
4000 K
4000 K
2200 K
4000 K
Luminous flux
12300 lm
20000 lm
27000 lm
12220 lm
Efficacy light source
77 lm/W
80 lm/W
108 lm/W
120 lm/W
160 W
275 W
275 W
110 W
LOR
90%
70%
70%
90%
Rated LLMF at 2,000h
95%
85%
95%
100%
Final lumen output
10500 lm
11900 lm
17900 lm
11000 lm
Total system efficacy
66 lm/W
48 lm/W
65 lm/W
100 lm/W
>80
>90
25
85
Power system
CRI
Technical specs: initial vs final efficacy
LED
120 lm/W
Module
110 lm/W
Luminaire
efficacy
100 lm/W
Lamp HPS
120 lm/W
Luminaire
efficacy
65 lm/W
It is always key to compare the final light output of the system.
For LED fittings it is crucial to get the final „hot“ light output and not the initial LED value.
Technical specs: colour rendering index
The CRI is reflecting the average value basing on standard reference values
1 Old pink
9 Deep red
2 Mustard yellow
10 Deep yellow
3 Yellow green
11 Deep green
4 Light green
12 Deep blue
5 Turquoise
13 Skin
6 Light blue
14 Chlorophyll
7 Purple
8 Lilac
The higher the CRI the lower the system efficacy
Typical CRI values
Incandescent
Halogene
Fluorescence
MH ceramic
HP Hg
HPS
LED
100
100
80-90
80-95
45-60
25
65 - 95
Technical specs: colour rendering index
LED CRI 80
DECHARGE CRI 80
R9
R12
Source : iLED + OSRAM
= 27,8
= 62,9
R9
R12
=0
= 95
Technical specs: binning
The LED binning
assures the
homogeneity from
LED to LED as well as
the homogeneity of
the complete
installation
Source : OSRAM
Fine binning example
Note : a binning indication in +/- Kelvin gives only
a limited indication
MacAdam steps (SDCM):
Area in which no colour difference is visible
Colour differences gets visible above the value of 3
Only a MacAdams Steps value is granting a good homogeneity of an LED based lighting
system.
Technical specs: system lifetime
Light output maintenance / lifetime ratio
Example MH 70W
Initial lm ECG :
Average L70
lm ECG :
LED
Source : ENDO
6600 lm
5250 lm = 80%
Technical specs : system lifetime
Example and interpretation of an LED lifetime curve
Technical specs: system lifetime
A good thermal management of the LED systems grants the
specified/extrapolated lifetime value.
T°
Temperature
Light output
Lifetime
Current
Source : OSRAM
A
C°
More temperature
 Shorter lifetime
 Less light output
More current
 More light output
 Shorter lifetime
Good thermomanagement
 More light output
 Longer lifetime
Temperature control
=
Lifetime control
Technical specs: glare
A topic to consider with attention
• An LED based system can show very
attractive technical features
• In the application the result can
unfortunately be very disappointing
for the users
• LED light sources have a very punctual
light emission surface creating very
high luminance values
• It is very important to consider this
topic when considering an LED
lighting system especially when it
comes to illuminate work spaces
Product features
• Technical specs
• Quality – Safety - Warranty
• Price
Product features : Quality, Safety, Warranty
There is no “golden rule”, nevertheless...
Objectively:
• Technical specifications
• Precision of documents
• Certified light distribution curves
• Warranty claim and conditions
Subjectively:
• Reliability / experience of provider
• Provider profile : manufacturer or distributor
Product features
• Technical specs
• Quality – Safety - Warranty
• Price
Product features: Price
There is no “good price” but always a “right price”...
Objectively:
• Technical specifications
• Performance required
• Warranty claim and conditions
Subjectively:
• Reliability / experience of provider
• Provider profile : manufacturer or distributor
Thanks for your attention!
Q&A

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