P-50, 50 W, Ultra Rad-Hard LED
Nuclear grade Underwater LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP68, continuous submersion, depth up to 20 m
•
>120 lm/W overall efficacy, tested/certified
•
6.000 lm, CRI 80, CCT 5000K
•
Water temperature up to 50
o
C
•
“All-in-one” solution, no external boxes
•
Aluminium housing, anodized
•
100 % browning and shatter proof optics
Designed for research reactor pool lighting and NPP
underwater inspection lighting.
P-100, 100 W, Ultra Rad-Hard LED
Nuclear grade Underwater LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP68, continuous submersion, depth up to 20 m
•
Water temperature up to 50
o
C
•
>120 lm/W overall efficacy, tested/certified
•
12.000 lm, CRI 80, CCT 5000K
•
30 m underwater radiation tested cable included
•
“All-in-one” solution, no external boxes
•
Stainless Steel housing, no plastic parts, no Aluminium
or Zinc, assembled with rivets
•
100 % browning and shatter proof optics
Designed for nuclear reactor pool lighting.
H-100, 100 W, Ultra Rad-Hard LED
Nuclear grade High-Bay LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP68/69K, IK08, tested/certified
•
>160 lm/W overall efficacy, tested/certified
•
LOCA tested/certified
•
Seismic tested/certified
•
“All-in-one” solution, no external boxes
•
Stainless Steel housing, no plastic parts, no
Aluminium or Zinc, assembled with rivets
•
100 % browning and shatter proof optics
Designed for most demanding nuclear applications in the
RB of the NPPs.
Ultra radiation resistant nuclear grade LED Lighting
•
World’s highest tested and certified radiation tolerance in LED lighting industry: TID > 500 kGy gamma.
•
World’s first and only LOCA tested and certified LED Lighting products.
•
World’s first and only “all-in-one” nuclear grade LED solution. No external boxes are mounted elsewhere outside the
radiation zone. All our products have LED driver built-in inside the Luminaire.
Typical applications are:
•
NPP areas with the highest radiation impact.
•
Containment and spent fuel storage areas where LOCA and seismic certification according to the post-Fukushima
requirements are a must.
•
Most demanding Hot cell applications with highest radiation tolerance required.
•
Scientific and medical nuclear facilities with highest gamma and neutron requirements.
•
Speciality inspection lighting.
For commercial and technical informations, please contact us on nuclear@dito-lighting.com
FAQ: Radiation related questions
Q: Do you test your products with radiation source, or you just compile public documents describing radiation hardness
of electronics/materials?
A: We always test our products and never assume anything. All our products have full nuclear qualification and tests,
performed by third party certified laboratories.
Q: Which part of your Luminaire is tested to radiation?
A: Each and every part of our product is tested with gamma and neutrons. This includes all mechanical parts (housing,
screws, optics, diffuser, gaskets, coatings, connectors, wires etc.) and all electronic parts including LEDs and complete
LED control gear (driver).
Q: Where do you test your products and components?
A: All our products are tested inside the core of General Atomics TRIGA Mk II nuclear research reactor in Jožef Stefan
Institute, Reactor Infrastructure Centre in Ljubljana, Slovenia, EU. In case of gamma irradiation, the nuclear reactor is
shut down, without presence of neutrons. In case of neutron irradiation the research reactor is operating normally.
Q: Which part of LED Luminaire is the most problematic one regarding radiation?
A: LED control gear (driver) is by far the most problematic part of any LED Luminaire.
Q: Your electronics is not affected by gamma and neutron irradiation. Why?
A: Every electronics is affected by the radiation, including ours. We achieved world’s best radiation hardness in LED
lighting industry with careful selection of components and circuit topology, cancelling the effects of radiation damage.
Q: Many producers of LED Luminaires are testing just LEDs to gamma. Is this correct?
A: No. The LED itself is relative insensitive to radiation, opposed to power electronics which might be up to 1000 times
(three magnitudes of order) more sensitive. Testing LEDs only and assuming the Luminaire has the same radiation
hardness as LEDs, is false.
Q: Do you irradiate your electronics biased?
A: Of course. Our electronics (complete functional PCB) is irradiated biased, i.e. up and running at full power before,
during and after the test. Irradiation of non powered or unbiased electronics, or even components alone, not installed on
PCB, gives wrong, misleading result - a magnitude better then biased.
Q: Do you use Cobalt for gamma tests?
A: No. For gamma and for neutron irradiations we use TRIGA Mk II Nuclear Research Reactor. Nuclear reactor has similar
gamma spectrum to NPPs and better mimics real world situation inside the containment.
Q: Is your LED driver sensitive to the dose rate?
A: No. LED control gear is tested with the dose rates between 250 and 25.000 Gy/hour without any influence to operation
of the Luminaire.
Q: Your H series should have “World’s best radiation tolerance in LED lighting”. Is this correct?
A: Yes, it is. We specify our products with radiation tolerance of up to 500 kGy gamma total integrated dose (TID). In fact
we tested our electronic inside the core of the TRIGA MkII nuclear research reactor to more than 5 MGy (0.5 Grd) TID. And
the electronics is still functional. Radiation test report is available on request.
Q: Do you use shielding techniques?
A: No, there are no radiation shields inside the Luminaire. Radiation hardness is achieved by design.
FAQ: Photometry related questions
Q: Are your photometric data simulated/calculated or measured?
A: Our Luminaire photometric properties are measured in the Europe’s leading laboratories and not just calculated from
LED vendor data sheets.
Q: What is the output of the photometric measurements in the photometric lab?
A: Beside standard test report, the output of the photometry are photometric files used in simulation software. Eulumdat
.ldt and IESNA .ies files.
Q: Do your Lumen/Watt specification represent LED efficacy?
A: No, never. Our efficacy in lm/W is measured in the photometric lab and represent overall Luminaire efficacy - from the
wall outlet to the luminous flux out of the product.
Q: Your lm/W specification is relatively low in comparison to other LED Lighting vendors. Why?
A: Correct. The numbers are lower then most others, because we are not specifying LED efficacy as Luminarie efficacy.
There is big difference between this two numbers. LED efficacy is the number taken out of the LEDs manufacturer data
sheet, measured in the ideal conditions. Luminaire efficacy takes into account also all optical and electrical losses,
which lovers overall Luminaire efficacy. Optical losses are due to losses in optics, Luminaire housing, protective glass
or diffuser. The best designs with optics or diffuser have at least 20% of losses. If we add at least 10% of losses in the
LED driver, we can estimate overall losses to minimum 30%. In practice this value can be much higher. If Luminarie
incorporates high performance LED with 200 lm/W and if we take into equation optical end electrical losses, then overall
Luminaire efficacy is less than 140 lm/W.
Q: Why should I check which efficacy is specified in the Luminaire data sheet - LED efficacy or Luminaire efficacy?
A: Let me explain this with simple example. If we take high performance LED with data sheet efficacy of 200 lm/W and put
this LED into the black box, then the overall efficacy of this “Luminaire” will be exactly 0 lm/W. Which specification for
this “Luminaire” is now correct 200 lm/W or 0 lm/W?
Q: How to avoid wrong and misleading figures in the Luminaire data sheets?
A: Simple. Request photometric test report of the Luminaire.
Q: Are your photometric test reports available to the public?
A: All test reports are available to qualified customers.
FAQ: Reliability and lifetime related questions
Q: What is MTBF?
A: Mean Time Between Failures or MTBF represents the statistical approximation of how long a number of units should
operate before a failure can be expected. It is expressed in hours and does not represent how long the unit will last. For
instance. If we test 1.000 units for 1.000 hours and 1 failure occurs, the MTBF value would be 1 million hours. This does
not mean, that the unit will operate for 1 million hours or 114 years. If 1 million units are operating with calculated MTBF
of 1 million, a failure can be expected every hour.
Q: Who performed MTBF calculation for you?
A: We contracted our MTBF calculation with Israeli company A.L.D. , the leading consulting firm and software house in
the field of Reliability Engineering and Analysis, Safety Analysis and Safety Management, Quality Engineering and
Quality Assurance.
Q: Which method do A.L.D. use for MTBF calculation?
A: There are many methods and standards to choose from for MTBF calculation. We decide to perform MTBF calculation
according to US military specification MIL-HDBK-217F Notice 2, one of the most frequently used and recognized
standards in the industry.
Q: What is the relation between MTBF and lifetime?
A: The confusion between these two parameters is the most common confusion in the reliability theory. However, there
is some mathematical way to use MTBF to roughly expect a lifetime. For our products the calculated lifetime with 95 % of
confidence is about 22 years operating 24/7/365 - i.e. continuous operation. Due to exponential nature of mathematical
formula, for 100 % of confidence the calculated lifetime is zero hours, or with 0 % confidence, the lifetime is indefinite.
Q: 100.000 hours of lifetime is well known figure for LED lighting. Why are you complicating with calculations?
A: 100.000 hours is the number you can find in any LED component data sheet. It is a pure theoretical figure and give us
an idea how long a LED component (not a LED Luminarie) can last if it operates under ideal conditions. Conditions
inside the LED Luminarie, where the LED component is operating, are far from ideal. The operating temperature (bad
thermal design), current density (driving LED at maximum power), the technology and the quality of the LED component
are all affecting real operating life, which can be much lower then 100.000 hours.
Q: Does the LED Luminaire last as long as LEDs?
A: Not at all. LED Luminaire has many other components too. The most problematic, and the most unreliable one, is LED
control gear, sometimes called LED driver or ballast. By far the most unreliable components in any power electronics,
are electrolytic capacitors and opto couplers. Our power supply does not use any of them. Just for comparison. The
best electrolytic capacitors have lifetime expectancy of just few thousand hours at rated temperature. Should we expect,
that the Luminaire itself will last for 100.000 hours? Probably not.
Q: Finally, what is the lifetime of your Luminaire?
A: A million dollar question. Statistically speaking, more than 22 years with the confidence level of 95 %. Also
statistically, our Luminaire can fail in the first hour of operation or it can last forever. The probability of either is very low,
but is possible.
Q: Do you use third party LED driver?
A: No. We are using only LED driver developed and produced in-house with all required nuclear qualifications.
FAQ: Privacy policy related questions
Q: By browsing your web site, do you track my activity?
A: No, we do not track any of your activities.
Q: Do you use cookies?
A: No, we do not use cookies.
Q: Do you use any of standard analytics?
A: No, we do not use any of them.
Q: Do you respect my privacy?
A: This is our first priority. We are always respecting your privacy, therefore we are not collecting any information about
your activity on our web site.
L-100, 100 W, Rad-Hard LED
Cost effective Nuclear grade High-Bay LED Luminaire:
•
TID: 50 kGy (5 Mrd), tested/certified
•
Neutron fluence: 5×10
13
n/cm
2
1 MeV, tested/certified
•
IP65, IK07, tested/certified
•
>160 lm/W overall efficacy, tested/certified
•
16.000 lm, CRI 80, CCT 5000K
•
For high ambient temperatures up to 80
o
C
•
“All-in-one” solution, no external boxes
•
Aluminium housing, anodized
•
100 % browning and shatter proof optics
Designed for less demanding, cost sensitive nuclear
applications.
H-50, 50 W, Ultra Rad-Hard LED
Nuclear grade LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP68/69K, IK08, tested/certified
•
>170 lm/W overall efficacy, tested/certified
•
8.500 lm, CRI 80, CCT 5000 K
•
“All-in-one” solution, no external boxes
•
Stainless Steel housing, no plastic parts, no
Aluminium or Zinc, assembled with rivets
•
100 % browning and shatter proof optics
Designed for most demanding nuclear applications in
the RB of the NPPs. Ideal for hot cell lighting.
L-50, 50 W, Rad Hard LED
Cost effective Nuclear grade LED Luminaire:
•
TID: 50 kGy (5 Mrd), tested/certified
•
Neutron fluence: 5×10
13
n/cm
2
1 MeV, tested/certified
•
IP65, IK07, tested/certified
•
>160 lm/W overall efficacy, tested/certified
•
8.000 lm, CRI 80, CCT 5000K
•
For high ambient temperatures up to 80
o
C
•
“All-in-one” solution, no external boxes
•
Aluminium housing, anodized
•
100 % browning and shatter proof optics
Designed for less demanding, cost sensitive nuclear
applications.
LOCA tested and certified
H and E series are world’s first and only LOCA (Loss Of
Coolant Accident) tested and certified LED Luminaire.
H and E series are designed for typical DBA (Design Basis
Accident), where beside high radiation levels, high
temperatures, hot steam, high pressure and chemical
survivability are required.
LOCA certification is a post Fukushima requirement and
the ultimate test for any equipment mounted inside the
Reactor Building of the typical NPP.
The test was performed in UJV Rez Nuclear Institute,
Czech Republic.
Seismic tested and certified
An earthquake is one of the most feared natural
phenomena in any NPP.
After the Fukushima disaster, all equipment installed
inside the containment of the NPP, should have seismic
certification.
Our H-series has been seismically tested in one of the
Europe most advanced facility, the Military Institute for
Ground Forces in Czech Republic.
The test report is available on request.
Radiation tested and certified
Neutron and gamma irradiation tests were performed in
General Dynamics / General Atomic TRIGA Mk II Nuclear
Research Reactor in Jozef Stefan Institute, Ljubljana,
Slovenia.
Gamma spectrum of the research reactor mimics real life
situation in the NPPs .
Beside nuclear reactor irradiation, Cobalt irradiation test
was performed in Rudjer Boskovic Institute, Zagreb,
Croatia.
Both Nuclear Reactor and Cobalt irradiations show world’s
highest radiation tolerance in LED Lighting.
Photometrics
Photometric properties of the Luminaires were
measured in Europe leading photometric laboratories,
using latest photo goniometer instruments.
Our experts can offer to the customer complete lighting
design, using latest lighting design/simulation software.
This is the fastest, easiest, most cost effective and by far
most accurate approach to lighting without any
guessing.
Optical .ldt files for all our products are available on
request.
Custom solutions
Generation IV of our Ultra Rad-Hard LED Luminaires can
be modified according to the customer specification.
Possible modifications of the existing members of the
family are:
•
custom holder,
•
the shape of the Luminaire base plate,
•
the length of the mains cable.
All other characteristics are not affected by the
modification. All the documentation including certificates
remain the same as for the original, non modified version.
About us
DITO is an independent, fully privately held company founded in 1992 by Srecko Bizjak B.Sc. (CEO) and Rafael Kitak
B.Sc. (R&D). Both are exclusive owners of the company to this day.
In 1995 we developed world’s first multichannel, studio grade, PC based, digital audio recorder DAR-20. In the year 2000
we bring to the telecommunication market our DSP based multichannel, multifunctional, fully programmable, 2 Mbit/E1
digital voice announcement system.
In 2007 we developed TNS++, railway copper wire transmission system. TNS++ is still world’s unique product for
multichannel DSP based, fully programmable, very high performance tone communication, over standard railway copper
wire cables. The system is used for communication between relay based safety related railway equipment worldwide.
In 2009 we started with LED Lighting development. First, with the street and heavy duty industrial lighting products. In
2013 we jumped to nuclear LED Lighting business.
Our goal is to bring to the nuclear market world’s highest radiation hardness in the LED Lighting industry, world’s best
LOCA scenario compatibility and world’s best “all-in-one” in the air and under the water LED lighting system.
Contact
DITO d.o.o.
Gorica pri Slivnici 144,
3263 Gorica pri Slivnici
Slovenia/EU
DITO does not have sales representatives/distributors
elsewhere. We are selling our products to the customers
worldwide directly. For commercial or technical
questions, please contact us using an e-mail:
nuclear@dito-lighting.com
Sales Terms and Conditions
FAQ: Commercial questions
Q: Who designed/developed your products?
A: All our products are developed and designed is Slovenia/EU by our company.
Q: Who produces your products?
A: All our products are produced in Slovenia/EU by our company.
Q: Do you have sales representatives world-wide?
A: No, we do not have sales representatives/distributors. We are selling our products directly. This approach enables the
customers best pre- and post-sales support and lowest prices.
Q: How can I buy your products?
A: You can send your enquiries directly to us on nuclear@dito-lighting.com
Q: Are your products available of-the-shelf?
A: No. Our products are not produced serially. The production is always for known customer.
Q: What is the average lead time for the Luminaires?
A: The lead time is about 16 weeks. However the lead time may vary due to market conditions which are not under our
control
Q: What are your payment terms?
A: Our standard payment term is 100% prepayment at the moment of order. The order is accepted upon receipt of the
written Purchase order and the receipt of full payment.
Q: Can I cancel my order?
A: Unfortunately no. All orders are NCNR - Non Cancelable Non Returnable.
Q: Can I get the sample for evaluation?
A: Of course. In this case we will invite you to sign an NDA (Non Disclosure Agreement).
Q: Do you have an ITP (Inspection and Test Plan)?
A: Of course. ITP is the most important document. This document should be mutually agreed before the start of
production.
Q: Can we witness the production/testing?
A: Yes, Witnessing is specified/agreed in the ITP.
?
U-50, 50 W, Ultra Rad Hard LED
Ultra compact Nuclear grade Hot cell LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP50, IK07, tested/certified
•
>140 lm/W overall efficacy, tested/certified
•
7.000 lm, CRI 80, CCT 5000K
•
For high ambient temperatures up to 60
o
C
•
“All-in-one” solution, no external boxes
•
Aluminium housing, anodized
•
100 % browning and shatter proof optics
Designed for Hot cell application. Ultra compact, can be
inserted through the circular opening, diameter of 74 mm.
E-15, 15 W, Rad-Hard LED
Nuclear grade Emergency LED Luminaire:
•
TID: 500 kGy (50 Mrd), tested/certified
•
Neutron fluence: 5×10
14
n/cm
2
1 MeV, tested/certified
•
IP68/69K, IK08, tested/certified
•
>160 lm/W overall efficacy, tested/certified
•
2.500 lm, CRI 80, CCT 5000K
•
“All-in-one” solution, no external boxes
•
Stainless Steel housing
•
100 % browning and shatter proof optics
•
To be used with or without emergency sign
Designed for emergency lighting inside the reactor
building with highest radiation impact.
