General Council Office of Seine-Maritime, Rouen, France
- Lamp efficacy
Lamp efficacy
Ensuring the lamp efficiently converts electricity into light (lm/W).
- Ballast classification
Ballast classification
Controlling the electricity supply to the lamp (Energy Efficiency Index).
- Luminaire distribution
Luminaire distribution
Controlling light emission using optics which bend and shape the light to the correct location.
- System efficacy
System efficacy
Combining optical and thermal control within the luminaire (luminaire lm/W).
- 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
Maintenance must be performed in response to product age, performance and environment.
- 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.
Quattro LED acclaimed for energy saving
LED lighting has taken over from fluorescent at the Conseil Général de Seine Maritime building in Rouen, France.
Thorn's new recessed lay-in luminaire, Quattro LED, specially designed for offices and incorporating 48W LEDs, has been used to replace, point-for- point, 10-year-old fluorescent louvred fittings with 4x18W T8 lamps. The 750 energy-saving luminaires also provide better comfort and a totally different aesthetic. In fact, 99.99% of workers prefer the new lighting, only one person out of hundreds didn't like it, and that was simply a matter of personal preference rather than something more substantial.
There are further savings still to come on energy costs as the luminaires are linked in groups, four per office, to presence detectors.
Faced with drastically increased electricity tariffs and EU carbon reduction targets, local authorities have been looking for some time for cost effective and convenient alternatives to the T8 and T5 fluorescent lamps usually used for office lighting. With the advent of the Quattro LED, they now have this alternative. The solid state luminaire emits a comparable amount of light to a typical 4x18W T8 recessed modular fluorescent with magnetic gear for 45% less energy consumption.