![]() ![]() How Much light is required? Determination of tunnel Lighting requirements is provided in the Australian Standard AS/NZS 1158.5 2007 Lighting for roads and public spaces Part 5: Tunnels and underpasses. This phenomenon is generally known as the “black hole” effect. ![]() Design Principle Why do we need Tunnel / Underpass lighting? To ensure drivers can approach, pass through and exit the tunnel / underpass with a degree of safety commensurate to that of the approach road. Unlike an uncovered road the approaching driver’s adaptation level is significantly higher in comparison to the lighting level within the tunnel /underpass and therefore limits the driver’s ability to view the road surface, surrounds and other objects. This increasing demand also sees the evolution of an Australian Standard for tunnels and underpass lighting. The new standard is part of the AS1158 Series, Lighting for roads and public spaces Part 5: Tunnels and underpasses. Tunnel 280 Tunnel & underpass lighTing Tunnel & underpass lighTing As Australia’s population increases and governments endeavour to limit urban sprawl via consolidation of our cities and suburbs, congestion on our road networks is building and in-turn the reliance on tunnels and underpasses to improve traffic flow is set to continue. Even in rural areas increasing traffic volume combined with the desire to provide safer roads, mean existing roads that wind around and over mountains are now seen as goat tracks and tunnels are now being used as a viable alternative. Tunnel 279 Tunnel Tunnel & underpass Tunnel & Underpass Lighting Page 280 Tunnel Pro Single Series Page 283 Tunnel Pro Twin Series Page 284 Tunnel Pro Fluorescent Page 285 Tunnel Pro HE Asymmetric Fluorescent Page 287 Tunnel Pro HE Fluorescent Page 286 This feature eliminates the need to hang temporary lighting during maintenance events, saving time and money.Tunnel 278 Clem 7 moTorway,BrisBane,Queensland CourTesy of riverCiTy moTorway This provides engineers the freedom to place the lighting fixtures where space is available, while keeping the fixture out of the train’s dynamic envelope.Īn all-in-one lighting solution, our rail tunnel fixture features bi-level lighting, providing both normal and maintenance lighting from a single fixture. This compounds the already minimal space requirements of LED technology, resulting in an incredibly small form factor of just 1” round. Our proprietary direct-AC implementation is EMI silent, easily passing the most stringent MIL-STD-461 RF emissions testing.Īn additional benefit of the direct-AC technology is its compact size. ![]() This method is 100% solid-state, driving the LEDs directly from the AC input and eliminating the traditional LED driver, enabling us to provide an industry-leading 10 year warranty. Instead, we’ve built our tunnel lighting fixtures around modern direct-AC technology. We realized early on this was not acceptable in a tunnel environment, where maintenance is difficult and expensive. Traditional LED drivers (like a ballast inside of a legacy fluorescent light fixture) are life-limited components and have a MBTF of around 50,000 hours, well short of the LED lifespan of around 200,000 hours.
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