Japan's first! Development of a new tunnel LED lighting system using direct current power supply.
Technologies registered in the New Technology Information System (NETIS) have adopted both the direct current power supply method (CG-170008) and (TH-15008).
The newly developed tunnel LED lighting system, the first of its kind in Japan, has achieved miniaturization and weight reduction of the fixtures by installing the power supply unit inside the electrical room and supplying power to the lighting fixtures in the tunnel with direct current. Conventional products had the power supply unit within the fixture itself, but this product does not have a power supply unit inside the fixture, allowing for miniaturization and significantly reducing installation work. Additionally, by consolidating the power supply unit in the electrical room, maintenance has been simplified. The direct current-powered tunnel LED lighting system reduces construction costs by making the lighting fixtures ultra-compact and lightweight and using a connector system for power wiring, while installing the power supply unit in the electrical room enhances maintenance ease and safety. The direct current-powered tunnel LED lighting incorporates technologies registered with the Ministry of Land, Infrastructure, Transport and Tourism's New Technology Information System (NETIS) (CG-170008) and the technology for compact and lightweight LED tunnel lighting fixtures (TH-150008). Recently, we have supplied the tunnel LED lighting system for the Kyuuzan Tunnel (downhill L=1,704m) on National Route 185, under the jurisdiction of the Hiroshima National Highway Office, Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism.
basic information
Hoshi and Electric Co., Ltd. has been supplying lighting fixtures since 1957, when it provided lighting for the Kanmon Tunnel, the world's first underwater tunnel at that time. In 2010, it delivered the first LED tunnel lighting fixtures in Japan for a national highway directly managed by the Ministry of Land, Infrastructure, Transport and Tourism to the Enoura Tunnel. 1. The LED tunnel lighting fixtures with a direct current power supply system consist only of LEDs (light-emitting parts) without an internal power supply unit, resulting in an ultra-compact and lightweight housing, which reduces both fixture and installation costs compared to conventional products. 2. The dimming control of the tunnel lighting fixtures is possible through direct current control from the power supply unit in the electrical room, eliminating the need for dedicated dimming cables. 3. The power connection for the tunnel lighting fixtures uses waterproof connectors, which streamlines wiring connection work and contributes to a reduction in construction time. (Series connection method using CVV cables) 4. By installing the direct current power supply unit in the electrical room, maintenance for inspection and replacement is improved. 5. The tunnel lighting fixtures are designed without corrosion-prone components such as hinges and locks, enhancing fall prevention and safety. 6. The direct current power supply unit allows for remote monitoring via the web from computers installed in offices, enabling remote maintenance and preventive maintenance, including fault monitoring, through network connectivity.
Price information
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Applications/Examples of results
In March 2019, we adopted and delivered a tunnel LED lighting system for the Kyuuzan Tunnel (downhill, L=1,704m) on National Route 185 under the jurisdiction of the Hiroshima National Route Office, Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism.
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The compact and lightweight LED tunnel lighting fixtures from Hoshi and Denki have been selected as a useful technology under NETIS's "Promotion of Utilization Technologies."
We are pleased to announce that our newly developed compact and lightweight LED tunnel lighting fixture has been selected as a useful technology under the "Promotion of Utilization Technology" by NETIS. - NETIS Registration Number: TH-150008-VE - Technology Name: Compact and Lightweight LED Tunnel Lighting Fixture "STAR LED’S TUNNEL" - Registration Date: March 26, 2020 Overview - As the prevention of falling road accessories becomes increasingly important, we have developed an aluminum LED tunnel lighting fixture (slim type) that excels in workability and safety due to its compact and lightweight design, serving as an alternative to conventional stainless steel press fixtures, and have registered it with NETIS ahead of other companies. - Based on its performance in direct construction projects by the Ministry of Land, Infrastructure, Transport and Tourism, it has been evaluated as a "useful technology" superior to conventional technologies and has now been positioned as a "Promotion of Utilization Technology." - By utilizing "useful technologies" such as promotion of utilization technologies in lighting equipment construction, we expect to gain additional points during bidding and in construction performance evaluations. (Note: The application may vary by the Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism.)
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Received the "Lighting Promotion Award" from the Illuminating Engineering Society for Seiwa Electric's DC-powered tunnel LED lighting system.
We are pleased to announce that our developed DC power supply tunnel LED lighting system has received the "Lighting Promotion Award." Lighting Society "Lighting Promotion Award" Recipient - Award Name: Lighting Society 2019 Lighting Promotion Award - Recipient: Hiroshima Road Office, Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism - Equipment: Hiroshima National Route 185 Kyuyama Tunnel (downhill lane) * The DC power supply tunnel LED lighting system developed by Seiwa Electric was delivered to the Hiroshima National Route 185 Kyuyama Tunnel (downhill lane). - Award Date: March 27, 2020 Overview DC power supply LED tunnel lighting equipment for the "Hiroshima National Route 185 Kyuyama Tunnel (downhill lane)." About the Lighting Society Lighting Promotion Award Since its establishment in 1957, the Lighting Society (Lighting Promotion Subcommittee) has awarded the "Lighting Promotion Award" to outstanding lighting facilities completed in that year. This award is given to those who have made significant contributions to the planning, design, and construction of the facility, and the selection process comprehensively evaluates aspects such as visual environment, lighting techniques, and lighting effects, recognizing it as a representative lighting facility of the region.
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Received the "Best Development Award" from the Institute of Electrical Equipment: Seiwa Electric's DC Power Supply Tunnel LED Lighting System.
We are pleased to announce that our developed DC power supply tunnel LED lighting system has received the "Best Development Award." Electric Equipment Society - "Best Development Award" Received - Award Name: 31st Electric Equipment Society Technical Division Best Development Award - Award Recipients: Equipment Development: Seiwa Electric Co., Ltd. / Construction: Nagano Electric Works Co., Ltd. - Achievement: Development of DC-powered tunnel lighting system - Award Date: April 2, 2020 Overview This system consolidates the DC power supply unit in one location, installed in the electrical room, and is recognized as the "first DC-powered tunnel lighting system in Japan." It has achieved the following three objectives, which were highly evaluated for its potential to be widely deployed in tunnels and similar applications. (Excerpt from the reasons for the award) 1. Miniaturization and lightweight design of lighting fixtures 2. Significant reduction in cable installation costs leading to improved economic efficiency 3. Enhanced maintainability through equipment consolidation Electric Equipment Society Development Award This award recognizes achievements related to inventions and ideas concerning technology, equipment, products, and systems related to research and development, as well as construction techniques, deemed worthy of the Electric Equipment Society Award "Technical Division." Each year, one Best Development Award and several Excellent Development Awards are presented.
