Electric.ie January/February 2018

56 ELECTRIC.IE • The Magazine & Website for the Irish Electrical Industry • Industry News Thorn Provides an Eye-catching Stream of Light Across the Firth of Forth – Lighting the New Queensferry Crossing T Š‘” ‹‰Š–‹‰ Šƒ• •—’’Ž‹‡† luminaires for the ‹ŽŽ—‹ƒ–‹‘ ‘ˆ –Š‡ —‡‡•ˆ‡””› ”‘••‹‰ ‹…‘–Žƒ†Ǥ Š‘” ‹‰Š–‹‰ Šƒ• ™‘”‡† ™‹–Š national M&E specialist SES ‰‹‡‡”‹‰ ‡”˜‹…‡• ȋ Ȍǡ ‘ –Š‡ ‡™ ͏ͱǤͳ͵ „‹ŽŽ‹‘ „”‹†‰‡ •’ƒ‹‰ –Š‡ ‹”–Š ‘ˆ ‘”–Š ™Š‹…Š Šƒ• „‡‡ †‡•‹‰‡† –‘ ”‡Ž‹‡˜‡ ’”‡••—”‡ ‘ –Š‡ ‘”–Š ‘ƒ† ”‹†‰‡Ǥ Thorn’s Aquaforce, Altis, Deckedge ƒ† ”—• Ž—‹ƒ‹”‡• ƒ”‡ „‡‹‰ used to great effect to illuminate the imposing structure and provide an eye-catching stream of light across the Forth. Š‡ ͲǤͷ Ž‘‰ǡ ‹…‘‹…—‡‡•ˆ‡””› Crossing is positioned upstream from the iconic Forth railway bridge and is the longest three-tower, cable-stayed bridge in the world and ™‹ŽŽ •‡”˜‡ ƒ”‘—† Ͳʹ ‹ŽŽ‹‘ ˜‡Š‹…Ž‡• each year. There are three towers ‘”‡ –Šƒ ͲͰͰ Š‹‰Š Ȃ –Š‡ ‘”–Š ƒ† •‘—–Š –‘™‡”• ƒ”‡ ͲͰͲ ƒ† –Š‡ …‡–”ƒŽ –‘™‡” ‹• ͲͱͰ Ȃ ƒ† ͲͳǡͰͰͰ miles of cabling, almost enough to wrap around the circumference of the earth, suspends the bridge from three towers. These cables provide extra strength and stiffness to the structure, yet the towers remain narrow and elegant. Thorn’s lighting scheme for the Queensferry Crossing was specifically developed to enhance the aesthetics of the bridge and ensure an energy efficient lighting scheme was in place. The lighting technologies and luminaires were carefully chosen for each specific condition using lenses and focusing to reduce spill and glare. Š‘”ǯ• ͱ™ ƒ† Ͳ™ Ž–‹• ‡–ƒŽ halide floodlights were chosen to illuminate the three towers and ensure the distinctive shape of the bridge is highlighted at night. Altis is a high performance HID floodlight that incorporates an innovative, patented optic that offers a unique range of photometry that is perfect for the levels of vertical illuminance required for the towers. The excellent thermal ƒƒ‰‡‡– ƒ† Š‹‰Š Ͷ͵ protection ensures consistency and stability of light over the lifetime of the fitting. The bridge includes a specially †‡•‹‰‡† ͳ ƒ…”›Ž‹…™‹†•Š‹‡Ž† across its entire length to reduce wind and to keep the bridge open in the event of strong gusts. For ƒ‡•–Š‡–‹…”‡ƒ•‘•ǡ ‹– Šƒ• ͲǡͶͱͰ custom made ‘Deckedge’ LED linear fittings installed, to provide a continuous strip of light across –Š‡ ‘”–ŠǤ ‹–Š‹ –Š‡ †‡…• ͲǡͰͲͶ luminaires provide lighting for those servicing electrical equipment and the dehumidification plant. ‘” –Š‹•ǡ Ͷ͵ ”ƒ–‡† “—ƒˆ‘”…‡ LED luminaires have been installed underneath the bridge in maintenance areas to provide high quality, low energy lighting in the