星和電機 Official site

Contact Us
  • PRODUCT

Japan's first! Developed and delivered a new tunnel LED lighting system using direct current power supply.

星和電機

星和電機

Hoshi and Electric Co., Ltd. has been supplying lighting fixtures for numerous roads and tunnels since 1957, when it delivered lighting fixtures for the Kanmon Tunnel, the world's first underwater tunnel at that time. In 2010, it supplied Japan's first LED tunnel lighting fixtures for the Enoura Tunnel, which is under the direct jurisdiction of the Ministry of Land, Infrastructure, Transport and Tourism, continuously leading tunnel lighting in Japan. The newly developed tunnel LED lighting system, the first of its kind in Japan, features a power supply unit installed inside the electrical room, providing direct current to the lighting fixtures in the tunnel. This innovation allows for the miniaturization and lightweight design of the fixtures. While conventional products had the power supply unit within the fixture itself, this new product does not, enabling a reduction in size and significantly easing installation work. Additionally, by consolidating the power supply unit in the electrical room instead of within the fixture, maintenance has been simplified. 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 Route Office of the Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism.

Ministry of Land, Infrastructure, Transport and Tourism, Chugoku Regional Development Bureau, Hiroshima National Route Office, National Route 185 Kiyama Tunnel (Downward L=1,704m)
LED tunnel lighting fixture

Related Documents

Related Links

Japan's First! Development and Release of a New Tunnel LED Lighting System Using Direct Current Power Supply
The newly developed tunnel LED lighting system, the first of its kind in Japan, has achieved miniaturization and weight reduction of the lighting fixtures by installing the power supply unit inside the electrical room and supplying power to the fixtures in the tunnel with direct current. Conventional products had the power supply unit inside the fixture itself, but this product allows for miniaturization since there is no power supply unit inside the fixture, significantly reducing installation work. Additionally, by consolidating the power supply unit in the electrical room instead of inside the fixture, maintenance has been simplified.
Seiwa Electric Co., Ltd.
Homepage of Seiwa Electric Co., Ltd.

Related product information

  • Sign lighting using tunnel lighting fixtures, the first of its kind in the country.

    We have delivered sign lighting using tunnel lighting fixtures, the first of their kind in Japan, to the Shin-Meishin Expressway (from Takatsuki JCT/IC to Kobe JCT).

    We are engaged in manufacturing that contributes to a society of information and safety by challenging new technologies. To eliminate rear-end collisions caused by tunnels, which are common on highways, we have delivered sign lighting. In the event of a fire occurring inside a tunnel, the lighting fixtures will flash red. In that case, by stopping without entering the tunnel, we can minimize secondary damage. To avoid collisions with broken-down vehicles or accidents caused by falling objects, the lights will flash yellow, so please reduce your speed and drive carefully at that time. Until now, we have alerted drivers with text information only, but from now on, you will be able to understand that we are providing visual alerts. By adopting LED lighting, dark tunnels will become brighter, and by providing hazard information, traffic congestion is also expected to be alleviated. As a result, you will be able to enjoy a comfortable journey on your travel plans at home or during bus trips, arriving on time. Additionally, you will be able to avoid rear-end collisions caused by traffic jams in tunnels, ensuring a safe and secure trip. This is the manufacturing of Seiwa Electric that delivers peace of mind and safety.

  • The first domestic pacemaker light using tunnel lighting fixtures.

    We have delivered pace maker lights using tunnel lighting fixtures, the first of their kind in Japan, to the Shin-Meishin Expressway (from Takatsuki JCT/IC to Kobe JCT).

    We are engaged in manufacturing that contributes to a society of information and safety by challenging new technologies. To resolve traffic congestion often caused by tunnels on highways, we will implement pace maker lights as a solution. With the alleviation of traffic jams, you can enjoy a comfortable journey on time for your family travel plans or bus trips. It is also delightful that you can spend more leisurely time at your destination than before. Additionally, this will help avoid rear-end collisions caused by traffic jams in tunnels, ensuring a safe and secure journey. This is the manufacturing of Seiwa Electric that delivers peace of mind and safety.

Return to news list