HiRad-200PL ® Rad-Hard underwater LED Luminaire
Underwater pool lighting has many small, lightweight but powerfull LED units. Each unit weight about 1 kg. One unit offers more than 5000 lm. System is designed for continuous submersion.
HiRad-50LB ® Rad-Hard Low-Bay LED Luminaire
HiRad-50LB ®  is very light and compact Low-Bay LED Luminaire equipped with opal diffuser  designed for simple one-to-one replacement of the existing 200 W tungsten or standard T8 based fluorescent Luminaires. Recommended mounting height is less than 6 meters.
LED control gear World’s best radiation hardness
World’s best radiation hardness  in LED Lighting, of more than 500 kGy, is a result of carefull selection of the components and the circuit topology. LED control gear is developed and produced by DITO Lighting.  Electronics is based on discrete components without integrated circuits, electrolytic capacitors and optocouplers. LED control gear also demonstrates excellent MTBF of over 3.7 milion hours at 50 o C ambient temperature, using MIL-HDBK-217F  Notice 2 calculation method.
LoRad-150HB ® Rad-Hard High-Bay LED Luminaire
LoRad-150HB ®   has the same electrical and optical properties as HiRad-150HB ®  . By using lower grade materials and components this version is much more affordable, with radiation tolerance of up to 10 kGy. LoRad-150HB ®   is designed for less demanding nuclear applications.
HiRad-150HB ® Rad-Hard High-Bay LED Luminaire
HiRad-150HB ®  is a powerfull LED Luminaire, yet very light, compact and easy to install, designed for simple one-to-one replacement of the existing 1 kW tungsten or 500 W HID based Luminaires. It is a High-Bay luminaire designed for mounting heights of over 8 meters.
HiRad-150HB ® Rad-Hard High-Bay LED Luminaire
HiRad-150HB ®    is powerfull, 150 W High- Bay LED Luminaire, delivering more than 17 klm at overall Luminaire efficacy of more than 112 lm/W. HiRad-150HB ®   remains operational at massive gamma doses of over 500 kGy or 50 Mrad, tested inside the core of TRIGA Mk II nuclear research reactor. More…
HiRad-50LB ® Rad-Hard Low-Bay LED Luminaire
HiRad-50LB ®   is scaled-down version of our flagship product HiRad-150HB ® , sharing the same, proven technology with his older brother. It’s a nuclear grade low-bay LED luminaire, designed to be used in moderate to high radiation areas. Nominal power of 55 W at 5600 lm. More…
HiRad-200PL ® Modular Rad-Hard LED Pool Luminaire
HiRad-200PL ®   is high performance, modular, underwater LED luminaire designed to be used inside the nuclear reactor pool, continuosly submerged. One unit has four underwater 50 W LED lamps on common holder. Total power of the unit is 200 W, with more then 22.000 lm of luminous flux. More…
Minimizing staff exposure Hirad® series is designed mainly for high radiation areas especially inside nuclear reactor containment.  Beside the radiation hardness, the reliability of the product was of the main concern.  Long lifetime and no need for relamping results in lower staff exposure to radiation, according to ALARA radiation safety principle.  The Luminaire is fitted with the connector. Skilled technician can replace damaged unit in less than 2 minutes. When nature strikes One of the most feared natural phenomena in any nuclear facility is the earthquake. Our LED products were tested according to IEEE 344 2013 Seismic Qualification Test for Nuclear Power Plants, surviving and functioning normaly with the base excitation of more than 20 g in any direction in the frequency range between 1 and 40 Hz.  Complete HiRad® series demonstrates extremly high seismic capacity.  It operates in both OBE and SSE events.
Designed for unthinkable Hirad® series is designed for any application where high or even extreme radiactivity can be expected, allmost independently of the dose rate.   Hirad® series operates not only under constant steady state irradiation, but can survive also rare event of gamma and neutron burst, caused by unexpected nuclear reactor critical power excursion. It is designed with post-Fukushima requirements in mind and tested for design basis accidents and beyond. All irradiation tests were performed inside the nuclear reactor core with the actual Nuclear Power Plant gamma and neutron spectrum.
Full Nuclear Qualification HiRad ®   series of LED Luminaires is designed  and made from ground up in Slovenia, EU, by DITO Lighting  in cooperation with the Jožef Stefan Institute, Reactor Infrastructure Centre, Ljubljana. Whole HiRad ®   series of LED products has full third party nuclear qualification including: radiation tolerance test seismic capacity test reliability and lifetime prediction calculation safety, environmental and EMC tests complete photometry tests and pressure and chemical compatibilty tests
Contact us DITO Lighting Gorica pri Slivnici 144 3263 Gorica pri Slivnici Slovenia, EU VAT: SI59718587 nuclear@dito-lighting.com http://www.dito-lighting.com
LoRad-50LB ® Rad-Hard Low-Bay LED Luminaire
LoRad-50LB ®   with radiation tolerance of up to 10 kGy gamma is designed for nuclear applications where lower doses of gamma can be expected. Other optical and electrical characteristics are the same as HiRad-50LB ®  .
Other LED products Heavy duty industrial and street Luminaires
Extreme 3  HD Series ®  is a line of high performance Heavy Duty LED lighting products, designed for demanding industrial applications. It includes heavy duty industrial High-Bay lighting and a series of street Lighting Luminaires. More…
LED Pool Lighting A modular approach to underwater lighting
Main advantage of modular approach is simple selection of illumination pattern, scalable illumination, simple upgrading, robustness and very easy replacement. Depending on the nuclear requirements the Luminaire body is machined out of aluminium or copper. Copper is used mainly in NPP’s, aluminium is used in scientific research reactors. Holders are always custom made out of stainless steel. LED control gear is located outside the reactor pool for easy maintenance.
Seismic damper Damping extreme seismic events
Whole HiRad ®  series is equipped with the special seismic dampers. The damper absorbs earthquake schocks and converts seismic energy to the temperature. The damper works well in all three axis in the frequency range from 1 to 40 Hz.
HiRad-150HB Leaflet HiRad-50LB Leaflet HiRad-200PL Leaflet
Gamma and neutron hardness Gamma and neutron irradiation tests were performend in the General Dynamics / General Atomic TRIGA Mk II nuclear research reactor in Jožef Stefan Institute, Reactor Infrastructure Centre in Ljubljana, Slovenia. Gamma spectrum of the research reactor mimics real life situation in the NPP much closer then classic irradiation with the 60 Co gamma source. The only choice for neutron irradiation is nuclear research reactor, like TRIGA Mk II. In absence of nuclear standards for Luminaires, military and aerospace standards for irradiation of electronics were used where applicable: MIL-STD- 830, Method 1017 (neutrons) and Method 1019 (gamma) and European Space Agency ESCC No. 2290 for gamma. 
Photometrics Photometric properties of the Luinaries were measured in Europe leading photometric laboratories, using latest photogoniometer instruments. The results of measurements are polar light distribution, color spectral distribution, correlated color temperature and color rendering index. Optical .ldt or .ies files are available on request. All requests should be addressed to nuclear@dito-lighting.com
Partners DITO Lighting and Jožef Stefan Institute, Reactor Infrastructure Centre, signed longterm agreement of cooperation in development and production of Radiation tolerant LED Luminaires. DITO’s part in the joint venture is development of the electronics, IJS’s role is the expertise in the field of radiation hardness of the mechanical and electronic components used in the final product. The reactor has been playing important role in developing nuclear technology and safety culture in Slovenia. TRIGA Mark II was built by Jožef Stefan Institute in 1966. The reactor itself was delivered by General Atomics. 20 Ph. D. research works, 30 M. Sc. degree works and more than 100 Diploma works have been performed using the reactor. More…
EMC Nuclear facilities are packed with precision electronics and high sensitivity sensors, cruicial for proper operation of safety related eqipment. Modern lighting systems are using switching power supplies. Therefore selection of high performance LED lighting is neccessary to prevent interference with other electronics. The result of very careful PCB design of our HiRad ®  series is so called “quiet” design, with extremly low EMC footprint.
Reliability and lifetime expectancy The reliability prediction was performed using A.L.D. Ltd. Software “RAM Commander”, in accordance with the MIL-HDBK-217F Notice 2, using Part Stress Analysis method. Environmental condition: GB (Ground Benign).  Mission profile 24/7/365 (continuous operation) at ambient temperature 50 0 C. MTBF values vs. temperature are shown in a graph. Lifetime expectancy at specified mission profile is more than 22 years. Calculation is based on 95% confidence level.
Chemical compatibility and pressure Boric acid is commonly used as neutron absorber. Our HiRad ®  series is tested in the chemical laboratories of Jožef Stefan Institute in Ljubljana for chemical compatibility with common chemicals usualy found in the NPP’s. None of the materials used in Luminaire construction is affected by the chemicals. Overpressure test of the containment is standard procedure in many NPP’s. HiRad ®  series of Luminaires are designed and tested for high ambient pressure of over 7 bar, however due to special pressure equalization system, a much higher ambient pressure can be tolerated. Allowable pressure change is 1.5 bar/h.
Seismic capacity HiRad-150HB ®  has been tested according to IEEE 344-2013: Standard for Seismic Qualification of Equipment for Nuclear Power Generating Station. IEC 60980: Recommended practices for seismic qualification of electrical equipment of the safety system for nuclear generating stations. Tested by ZAG, Slovenian National Building and Civil Engineering Institute, Laboratory for Building Stuctures and Earthquake Engineering.
DITO LIGHTING World’s best radiation hardness in LED Lighting