Hjørring Library, Denmark
- Lamp efficacy
Lamp efficacy
By switching from Chalice 190 H to Chalice190 LED, power consumption has been reduced by 50-70 per cent, while the advanced LED system has either maintained or increased light output. This equates to sigificantly improved energy efficiency and performance.
- Ballast classification
Ballast classification
Controlling the electricity supply to the lamp (Energy Efficiency Index).
- Luminaire distribution
Luminaire distribution
Good levels of vertical illuminance provide light onto walls and the front of bookcases resulting in a bright welcoming space and allowing book titles to be read easily.
- System efficacy
System efficacy
Optical and thermal control within the luminaire are essential as even two lanterns of the same LED can have a widely differing light output ratio (LOR), lifetime and colour performance. Chalice 190 LED’s good luminaire design achieves a strong LOR and minimises light loss.
- Presence/absence detection
Presence/absence detection
Presence: Lights automatically turn on/off with movement. Absence: Lights automatically turn off and must be manually switched on.
- Daylight detection
Daylight detection
Artificial lighting which responds to the natural light conditions.
- Constant illuminance
Constant illuminance
A function designed to produce correct light levels for the duration of the maintenance period.
- Task-scene setting
Task-scene setting
Allowing the user to set scenes and adapt the lighting to different tasks.
- Timed off
Timed off
Automatic cut-off can be installed to turn all lights off during unoccupied hours.
- Task lighting
Task lighting
Lighting task areas with the correct amount of light.
- Zoning of lighting
Zoning of lighting
Lighting is zoned according to area use.
- Maintenance schedule
Maintenance schedule
With a 50,000-hour lifetime (@L70, Ta 25˚c), Chalice 190 LED minimises loss of light over time. In turn, the frequency of maintenance and the number of luminaires required to maintain lighting levels over the years are kept to a minimum.
- Waste light
Waste light
Eliminating waste light which does not hit the intended target.
- Reflectance
Reflectance
Taking advantage of light which is reflected from the surface within the space.
- Visible smart metering
Visible smart metering
Results of actions can be quickly seen as increased or decreased energy use to encourage responsible energy consumption.
Chalice 190 refurbishment delivers 40% more light using 50% less energy
Hjørring Library is located in the Metropol shopping centre in the middle of Hjørring,Denmark. Its inspiring architecture is designed to create an affinity with readers of all ages. The library includes a vibrant children's section with a reading tree and 'fish pond' filled with books, a trendy youth section with a huge 'sitting blob' and a sophisticated adult area with Chesterfieldplants, mahogany furniture and reading lamps.
The library had been previously fitted with 250 Chalice 190 H compact fluorescent downlights. The launch of Chalice 190 LED in 2012 however meant the first 'true' passive cooled replacement for conventional TC-DEL downlights was available. Chalice 190 LED's ability to reduce energy consumption by up to 70 per cent, combined with identical product dimensions, ceiling cut-out and attachments for ease of installation, presented an excellent business case for refurbishing the lighting.
Other benefits of Chalice 190 LED include passive cooling technology which helps prevent the components over heating; this reduces the chance of malfunction and maintains performance. A computer-modeled reflector design with a breakthrough texture coating layer also improves vertical illuminance while the CRI of > 80 is in line with EN12464-1.
Positive feedback from installer and customer alike
Jesper Madsen from lighting installers Hjørring El-Teknik says: "The new lighting was required to consume less energy and by doing so, save energy related costs. As a minimum, the lighting level had to be maintained; however it has in fact increased. Because the old luminaires were Chalice downlights, the change to Chalice LED offered a quick and easy solution, as well as savings in relation to the cost of mounting the downlights."
Erik Østergaard from Hjørring Library says: "So far I have only had positive remarks about the new light. The corridors are brighter and the café area is more inviting with an uplifting atmosphere due to higher light levels."
For more information about Chalice 190 LED, go to www.thornlighting.com/CHLD
Key facts
Open spaces
Old installation: Chalice 190H 2x26W
Power: 54W
Light output: 380 lux
New installation: Chalice 190 LED
Power: 26W
Light output: 520 lux
Result: A 40% increase in light is achieved using less than 50% of the energy.
Corridors
Old installation: Chalice 190 H 2x26W
Power: 54W
Light output: 200 lux
New installation: Chalice 190 LED
Power: 14.7W
Light output: 200 lux
Result: 70% energy savings are achieved while maintaining the light level.
Product
- Chalice 190 LED