THE CITY of Helsinki has installed the first wave of street lights whose colour temperature varies throughout the day.
Forty five luminaires – whose colour temperature changes from a cool 5000K to warm 3000K - were switched on along a 2 kilometre section of road in the suburb of Kruunuvurenranta this week.
If the planned next wave of 1,000 luminaires goes ahead over the next 12 months it’s believed the project will become the largest colour-tuning street lighting deployment in the world.
The idea behind the installation – which includes a complex dimming regime – is to help alleviate the effects of the long winter nights on the moods of residents.
The concept was drawn up by London-based lighting design practice Speirs + Major in a design competition for the new residential area, which will eventually comprise 10,000 new homes on the site of a former oil harbour.
In the early afternoon, the lights are set to a cool 5000K shifting to a warm 3000K in the early evening.
In the late evening it becomes cooler - 4000K - and at 11pm it shifts to 5000K for the night.
Manufacturer Orangetek modified one of its existing products, the Ignis 2, specially for Kruunuvurenranta.
The control management system tunes between the luminaires two LED arrays, one 3000K and one 5000K.
‘The control of the white colour shift is excellent,’ Orangetek principal Nigel Parry told Lux. ‘The eye can easily see the variation in lighting colour throughout the evening.
‘The client’s very happy with the installation but the real test will be this coming winter'
‘The client’s very happy with the installation but the real test will be this coming winter and we’re really looking forward to feedback from residents.’
The Orangetek Ignis 2 C - the circadian lighting luminaire developed for the Kruunuvurenranta project – has now been shortlisted in the Exterior Luminaire of the Year category of the Lux Awards 2018.
Winners will be announced on the evening of Thursday 15 November 2018.
- The Safer Cities conference is one of a range of events taking place as part of the LuxLive 2018 exhibition at London ExCeL. The show is open on Wednesday 14 November and Thursday 15 November 2018. See the full programme HERE.