Welcome to the Future
Nuclear Grade LED Lighting. Our mission is to illuminate your nuclear project with world’s highest radiation resistant LED Fixtures. We believe in harnessing the power of our advanced technology and innovation to build a brighter future together. Join us in our journey through our Ultra radiation resistant LED Lighting technology.
Years of
Experience
34
Years in Nuclear
Business
12
Units Sold
1420
Business Partners
79
Srecko Bizjak, CEO
Rafael Kitak, R&D
Rok Bizjak, Production
© Copyright 2025 DITO Lighting d.o.o. | Last Update February 2025
Switch to Our Advanced Ultra Radiation
Resistant LED Lighting Technology Now.
Meet Our Team
Our team is dedicated to delivering top-tier Nuclear grade LED Lighting systems, creating value for your existing and future nuclear projects, supported by a technically skilled team with global experience in growing nuclear markets.Contact Us
The best, the fastest and most cost effective way to buy our products is to contact us directly. For general, technical and commercial questions, please use: nuclear@dito-lighting.com Our team will respond to your inquiry within one working day. We sell our products worldwide and do not rely on sales representatives, distributors, agents, or similar intermediaries. This direct approach ensures the highest quality pre-sales and post-sales support while guaranteeing the lowest possible prices for our products. Q: How can I buy your products? A: You can send your inquiries directly to us using the email address provided above. Q: Who designed and developed your products? A: All our products are designed and developed in Slovenia/EU by our company. Q: Who produces your products? A: All our products are manufactured in Slovenia/EU by our company. Q: What happened to your A-Series of LED Luminaires? A: Starting in early 2025, we decided to unify products that are similar or equal in technology and designed for comparable applications. The A-Series shares the same characteristics, materials, and technologies as the complete L-Series. As a result, the A-Series will now be integrated into the L-Series under the new designation L-25. Q: What happened to your U-Series of LED Luminaires? A: The U-Series was originally designed for specific hot-cell applications. Due to low market demand, we have decided to phase out the U-Series. While it is no longer recommended for new projects, it remains available for existing projects. We recommend transitioning to our L-Series, which offers better thermal and photometric performance at a more affordable price. Q: What happened to your P-Series? A: Due to low market demand, we have decided to phase out the P-Series. The P-50 model will remain available for existing projects, while the P-100 will be replaced in the future with a new, more powerful underwater ultra-radiation-resistant LED luminaire. Q: Are you producing other Nuclear Grade Luminaires not based on LED technology? A: No, we exclusively design and produce LED-based luminaires for nuclear-grade applications. Q: Does your LED driver need to be separated and shielded outside the radiation zone? Is the electronics sensitive to radiation? A: No, our LED driver (electronics) is integrated within the luminaire itself. There is no need for external boxes or shielding outside the radiation zone. This design allows for a simple replacement of legacy lighting technologies. All our luminaires are connected directly to the mains. Q: Are your products available off-the-shelf? A: No, our products are not mass-produced. Each production run is tailored to meet the specific requirements of a known customer. Q: What is the average lead time for the luminaires? A: The average lead time is approximately 16 weeks. However, this may vary depending on market conditions beyond our control. Q: What are your payment terms? A: Our standard payment term is 100% prepayment at the time of order. An order is officially accepted upon receipt of a written purchase order and the full payment. Q: Can I cancel my order? A: Unfortunately, no. All orders are NCNR (Non-Cancelable, Non-Returnable). Q: Can I get a sample for evaluation? A: Yes, we can provide a sample for evaluation. In such cases, we will request you to sign an NDA (Non-Disclosure Agreement) before proceeding. Q: Do you have an ITP (Inspection and Test Plan)? A: Yes, the ITP is a critical document. It must be mutually agreed upon before production begins. Q: Can we witness the production and testing? A: Yes, witnessing can be arranged. This is typically specified and agreed upon in the ITP. Q: Is your company ISO9001 certified? A: Yes.About Us
DITO Lighting is an independent, fully privately held company founded in 1992 by Srecko Bizjak B.Sc. (CEO) and Rafael Kitak B.Sc. (R&D). Both remain the exclusive owners of the company to this day. In 1995, we developed the world’s first multichannel, studio-grade, PC-based digital audio recorder (DAR-20). By 2000, we introduced a DSP-based, multichannel, multi- functional, fully programmable 2 Mbit/E1 digital voice announcement system to the telecommunications market. In 2007, we launched TNS++, a revolutionary railway copper wire transmission system. TNS++ remains the world’s only DSP-based, fully programmable, high- performance tone communication system designed for use over standard railway copper wire cables. This system is widely used for communication between relay- based safety-critical railway equipment worldwide. In 2009, we expanded into LED lighting development, starting with street and heavy-duty industrial lighting products. By 2013, we entered the nuclear LED lighting business, focusing on high-performance solutions for demanding environments. Our mission is to deliver the highest radiation-hardened LED lighting systems in the nuclear industry, offering unmatched LOCA scenario compatibility and the best "all-in-one" nuclear-grade LED lighting solutions for both air and underwater applications.
01
Top Reasons to Choose Us
Your nuclear project deserves the best Lighting technology available on the market
today. Very lightweight, easy to handle, reliable, proven, tested and certified. Our
Nuclear Grade LED Lighting.
Gamma TID >500 kGy
World’s highest radiation resistance in
LED Lighting industry. Up to 2 MGy
gamma TID resistance can be ordered
as an option.
02
03
04
Complete Range
From our top range H-Series for
harshest nuclear applications to the L-
Series, simplified, cost effective, yet still
high performance LED Fixtures.
Made in Slovenia
Our products are created, developed
and produced in our company in
Slovenia. Complete production process
is controlled by us.
All-in-one
Complete electronics is built into the
Fixture itself. No external boxes
mounted elsewhere outside the
radiation zone.
LED Lighting for Typical NPP Applications
LED Lighting for General Nuclear Applications
Who We Are
How We Sell
Head Office
Postal address: DITO Lighting d.o.o. Gorica pri Slivnici 144 3263 Gorica pri Slivnici Slovenia, EUCompany Details
Name of the Company: DITO Lighting d.o.o. CRN: 5629802000 VAT ID/EORI: SI59718587 REX Number: SIREX75 NACE: C27.400 Manufacture of electrical lighting equipment
Common properties
• > 500 kGy gamma TID as standard, 2 MGy TID option available, • IP68/IK08 ingress protection, • “all-in-one” solution, no external boxes needed elsewhere outside radiation zone, • direct connection to the mains, • full stainless steel design, • no aluminum, zinc, glass or screws, fully riveted, • no PC, PMMA or other plastics, • browning-proof and shatter-proof optics, • full set of test reports and certificates, including radiation resistance, LOCA, seismic, ILRT, CE, CB.H-Series members
H-100
Powerful 100 W LED Luminaire designed for High-Bay applications. Typical application is lighting around the polar crane inside the containment of the NPP.H-50
Our bestseller. Mid-power, 50 W LED Luminaire designed for Low-Bay applications inside the containment of the NPP.H-15
Low-power 15 Watt H-Series member (formerly known as E-15) for general lighting in small rooms or as an Emergency lighting product.
the H-Series.
The H-Series represents our most advanced line of Ultra Radiation Resistant, Nuclear
Grade LED Luminaires.
Our flagship series. Our bestseller. Designed without compromises for harshest nuclear
environments.
At the heart of our success lies our proprietary ultra radiation resistant LED driver, a
breakthrough innovation integrated across all our products. Unlike traditional solutions,
our design eliminates the need for external boxes outside the radiation zone,
streamlining deployment and operation.
This achievement is the result of years of relentless development and hundreds of
irradiation tests.
The H-Series is constructed from high-quality stainless steel, ensuring durability,
reliability and compliance with global NPP requirements for applications within the
reactor building, commonly referred to as "controlled areas" or "orange/red zones."
the L-Series.
The L-Series represents our latest generation of high-radiation, high-temperature-
resistant LED luminaires, tailored for general cost-sensitive nuclear applications.
Our design goal has always been to deliver high-performance, nuclear-grade LED
luminaires at an affordable price, making advanced technology accessible to the
industry.
Recently upgraded L-Series has improved photo-metrical and thermal performance,
resulting in higher reliability and longer expected lifetime.
Distinctive new safety features have been added. The Safe mode in case of abnormal
input voltage conditions and Thermal protection in case of excessive ambient
temperature. Both are designed to protect the luminaire from overheating or even
complete failure.
Common properties
• > 200 kGy gamma TID as standard, 2 MGy TID option available, • IP65/IK08 ingress protection, • “all-in-one” solution, no external boxes needed elsewhere outside radiation zone, • direct connection to mains, • high grade anodized aluminum design, • no PC, PMMA or other plastics, • browning-proof and shatter-proof optics, • different optics types available, • full set of test reports and certificates, including radiation resistance, CE, CB.L-Series members
L-100
Powerful 100 W LED Luminaire designed for High-Bay applications. The best choice for machine halls in typical NPP.L-50
Mid-power, 50 W LED Luminaire designed for general Low-Bay nuclear applications. Ideal choice for hot cells and accelerators.L-25
Low-power 25 Watt L-Series member for general lighting in smaller rooms, tunnels etc. Our most affordable nuclear grade LED Luminaire.
Welcome to the Future
Nuclear Grade LED Lighting. Our mission is to illuminate your nuclear project with world’s highest radiation resistant LED Fixtures. We believe in harnessing the power of our advanced technology and innovation to build a brighter future together. Join us in our journey through our Ultra radiation resistant LED Lighting technology.
Years of
Experience
34
Years in Nuclear
Business
12
Units Sold
1420
Business Partners
79
Srecko Bizjak, CEO
Rafael Kitak, R&D
Rok Bizjak, Production
© Copyright 2025 DITO Lighting d.o.o. | Last Update
February 2025
Switch to Our
Advanced Ultra
Radiation Resistant
LED Lighting
Technology Now.
Meet Our Team
Our team is dedicated to delivering top-tier Nuclear grade LED Lighting systems, creating value for your existing and future nuclear projects, supported by a technically skilled team with global experience in growing nuclear markets.Contact Us
The best, the fastest and most cost effective way to buy our products is to contact us directly. For general, technical and commercial questions, please use: nuclear@dito-lighting.com Our team will respond to your inquiry within one working day. We sell our products worldwide and do not rely on sales representatives, distributors, agents, or similar intermediaries. This direct approach ensures the highest quality pre-sales and post-sales support while guaranteeing the lowest possible prices for our products. Q: How can I buy your products? A: You can send your inquiries directly to us using the email address provided above. Q: Who designed and developed your products? A: All our products are designed and developed in Slovenia/EU by our company. Q: Who produces your products? A: All our products are manufactured in Slovenia/EU by our company. Q: What happened to your A-Series of LED Luminaires? A: Starting in early 2025, we decided to unify products that are similar or equal in technology and designed for comparable applications. The A-Series shares the same characteristics, materials, and technologies as the complete L-Series. As a result, the A-Series will now be integrated into the L-Series under the new designation L-25. Q: What happened to your U-Series of LED Luminaires? A: The U-Series was originally designed for specific hot-cell applications. Due to low market demand, we have decided to phase out the U-Series. While it is no longer recommended for new projects, it remains available for existing projects. We recommend transitioning to our L-Series, which offers better thermal and photometric performance at a more affordable price. Q: What happened to your P-Series? A: Due to low market demand, we have decided to phase out the P-Series. The P-50 model will remain available for existing projects, while the P-100 will be replaced in the future with a new, more powerful underwater ultra-radiation-resistant LED luminaire. Q: Are you producing other Nuclear Grade Luminaires not based on LED technology? A: No, we exclusively design and produce LED-based luminaires for nuclear-grade applications. Q: Does your LED driver need to be separated and shielded outside the radiation zone? Is the electronics sensitive to radiation? A: No, our LED driver (electronics) is integrated within the luminaire itself. There is no need for external boxes or shielding outside the radiation zone. This design allows for a simple replacement of legacy lighting technologies. All our luminaires are connected directly to the mains. Q: Are your products available off-the-shelf? A: No, our products are not mass-produced. Each production run is tailored to meet the specific requirements of a known customer. Q: What is the average lead time for the luminaires? A: The average lead time is approximately 16 weeks. However, this may vary depending on market conditions beyond our control. Q: What are your payment terms? A: Our standard payment term is 100% prepayment at the time of order. An order is officially accepted upon receipt of a written purchase order and the full payment. Q: Can I cancel my order? A: Unfortunately, no. All orders are NCNR (Non- Cancelable, Non-Returnable). Q: Can I get a sample for evaluation? A: Yes, we can provide a sample for evaluation. In such cases, we will request you to sign an NDA (Non- Disclosure Agreement) before proceeding. Q: Do you have an ITP (Inspection and Test Plan)? A: Yes, the ITP is a critical document. It must be mutually agreed upon before production begins. Q: Can we witness the production and testing? A: Yes, witnessing can be arranged. This is typically specified and agreed upon in the ITP. Q: Is your company ISO9001 certified? A: Yes.About Us
DITO Lighting is an independent, fully privately held company founded in 1992 by Srecko Bizjak B.Sc. (CEO) and Rafael Kitak B.Sc. (R&D). Both remain the exclusive owners of the company to this day. In 1995, we developed the world’s first multichannel, studio-grade, PC-based digital audio recorder (DAR- 20). By 2000, we introduced a DSP-based, multichannel, multi-functional, fully programmable 2 Mbit/E1 digital voice announcement system to the telecommunications market. In 2007, we launched TNS++, a revolutionary railway copper wire transmission system. TNS++ remains the world’s only DSP-based, fully programmable, high- performance tone communication system designed for use over standard railway copper wire cables. This system is widely used for communication between relay-based safety-critical railway equipment worldwide. In 2009, we expanded into LED lighting development, starting with street and heavy-duty industrial lighting products. By 2013, we entered the nuclear LED lighting business, focusing on high-performance solutions for demanding environments. Our mission is to deliver the highest radiation- hardened LED lighting systems in the nuclear industry, offering unmatched LOCA scenario compatibility and the best "all-in-one" nuclear-grade LED lighting solutions for both air and underwater applications.
Top Reasons to
Choose Us
Your nuclear project deserves the best
Lighting technology available on the
market today. Very lightweight, easy to
handle, reliable, proven, tested and
certified. Our Nuclear Grade LED Lighting.
01
02
03
04
Complete Range
From our top range H-Series for
harshest nuclear applications to the L-
Series, simplified, cost effective, yet still
high performance LED Fixtures.
Gamma TID >500 kGy
World’s highest radiation resistance in
LED Lighting industry. Up to 2 MGy
gamma TID resistance can be ordered
as an option.
All-in-one
Complete electronics is built into the
Fixture itself. No external boxes
mounted elsewhere outside the
radiation zone.
Made in Slovenia
Our products are created, developed
and produced in our company in
Slovenia. Complete production process
is controlled by us.
LED Lighting for
Typical NPP
Applications
LED Lighting for
General Nuclear
Applications
Who We Are
How We Sell
Head Office
Postal address: DITO Lighting d.o.o. Gorica pri Slivnici 144 3263 Gorica pri Slivnici Slovenia, EUCompany Details
Name of the Company: DITO Lighting d.o.o. CRN: 5629802000 VAT ID/EORI: SI59718587 REX Number: SIREX75 NACE: C27.400 Manufacture of electrical lighting equipment
Common properties
• > 500 kGy gamma TID as standard, 2 MGy TID option available, • IP68/IK08 ingress protection, • “all-in-one” solution, no external boxes needed elsewhere outside radiation zone, • direct connection to the mains, • full stainless steel design, • no aluminum, zinc, glass or screws, fully riveted, • no PC, PMMA or other plastics, • browning-proof and shatter-proof optics, • full set of test reports and certificates, including radiation resistance, LOCA, seismic, ILRT, CE, CB.H-Series members
H-100
Powerful 100 W LED Luminaire designed for High-Bay applications. Typical application is lighting around the polar crane inside the containment of the NPP.H-50
Our bestseller. Mid-power, 50 W LED Luminaire designed for Low-Bay applications inside the containment of the NPP.H-15
Low-power 15 Watt H-Series member (formerly known as E-15) for general lighting in small rooms or as an Emergency lighting product.
the H-Series.
The H-Series represents our most advanced line of
Ultra Radiation Resistant, Nuclear Grade LED
Luminaires.
Our flagship series. Our bestseller. Designed without
compromises for harshest nuclear environments.
At the heart of our success lies our proprietary ultra
radiation resistant LED driver, a breakthrough
innovation integrated across all our products. Unlike
traditional solutions, our design eliminates the need
for external boxes outside the radiation zone,
streamlining deployment and operation.
This achievement is the result of years of relentless
development and hundreds of irradiation tests.
The H-Series is constructed from high-quality
stainless steel, ensuring durability, reliability and
compliance with global NPP requirements for
applications within the reactor building, commonly
referred to as "controlled areas" or "orange/red
zones."
the L-Series.
The L-Series represents our latest generation of high-
radiation, high-temperature-resistant LED luminaires,
tailored for general cost-sensitive nuclear
applications.
Our design goal has always been to deliver high-
performance, nuclear-grade LED luminaires at an
affordable price, making advanced technology
accessible to the industry.
Recently upgraded L-Series has improved photo-
metrical and thermal performance, resulting in
higher reliability and longer expected lifetime.
Distinctive new safety features have been added. The
Safe mode in case of abnormal input voltage
conditions and Thermal protection in case of
excessive ambient temperature. Both are designed to
protect the luminaire from overheating or even
complete failure.
Common properties
• > 200 kGy gamma TID as standard, 2 MGy TID option available, • IP65/IK08 ingress protection, • “all-in-one” solution, no external boxes needed elsewhere outside radiation zone, • direct connection to mains, • high grade anodized aluminum design, • no PC, PMMA or other plastics, • browning-proof and shatter-proof optics, • different optics types available, • full set of test reports and certificates, including radiation resistance, CE, CB.L-Series members
L-100
Powerful 100 W LED Luminaire designed for High-Bay applications. The best choice for machine halls in typical NPP.L-50
Mid-power, 50 W LED Luminaire designed for general Low-Bay nuclear applications. Ideal choice for hot cells and accelerators.L-25
Low-power 25 Watt L-Series member for general lighting in smaller rooms, tunnels etc. Our most affordable nuclear grade LED Luminaire.
Contact Us:
