Energy Efficiency Controls
“Mount Lighting offers the option of built-in occupancy and light-linking detection in many of its luminaires.”
Occupancy Detection involves using PIR and Microwave detection to help cut down unnecessary energy-consumption. This is done in different ways;
Once motion is detected, the lamp lights up. After a specified period with no movement, the lamp switches off.
Using a dimmable ballast, the lamp will turn on in the same way but will dim down to as low as 10% during absence. Again, this can be turned off after a specified time or remain dimmed at 10% until presence is detected when full illumination is immediately restored. This option is shown in the illustration opposite.
Another useful feature is daylight-linking. This means that as well as detecting movement, the controls automatically adjust the lamp output depending on the light level at the time.
Dimmable Occupancy Detection
As described in Level 2, Mount Lighting offers the option to dim lamps down to low level on absence rather than switching the lamps on and off. This is done by utilising a ‘Corridor Function’ dimming ballast rather than a fixed output which will dim down the lamp to a low level of approximately 10% on absence.
Dimmable occupancy detection is ideal for applications such as stairwells, carparks and corridors where areas are typically only occupied for a small proportion of the day, but where continual illumination is necessary for safety. The graph below shows the typical consumption of a luminaire with this type of controls.
A luminaire dimmed to 10% saves 80% of energy and payback can be as short as 10 months.
Above Images show:
- Lights Off – Light level is sufficient during day whether area is occupied or not
- Lights On – Occupied but insufficient daylight
- Lights Dim – To 10% when person leaves area
- Lights Turn Off – When area remains unoccupied for a set period of time
“With energy prices apparently going in only one direction (UP!) and the increasing demands to reduce consumption, Mount Lighting can offer solutions to help you cut down your energy bills and save you money.”
Benefits of Dimming Vs. Switching On/Off
- Better for safety and security.
- Eliminates delays due to cold lamp start up.
- The lamp life is not adversely affected as it would be by continual switching on/off.