The accumulation of dirt and lumen depreciation cause light loss and uncontrolled schemes are initially "over lit" to compensate. This results in excessive energy consumption over the maintenance cycle.
Thorlux lighting controls allow luminaires to be dimmed to the required lighting level therefore avoiding over lighting and reducing energy consumption. This initial lighting level is sustained throughout the maintenance cycle by gradually increasing power, thereby maintaining the correct lumen output.
When daylight enters a room the lighting controls take this light into account and gradually dim the luminaires, saving energy whilst maintaining the required light level. As daylight increases, luminaire output decreases and luminaires may even switch off, therefore reducing energy consumption. The result is further savings in addition to those achieved by maintained illuminance (see above).
Passive Infra-Red (PIR) sensors are used to detect movement to turn the luminaires on. After a predetermined time of no movement the luminaires will turn off, saving energy.
Some PIRs can be programmed for "absence" mode whereby the luminaires are not initially turned on automatically by movement, but manually by the user with a switch; the PIR will then monitor movement to turn the luminaires off automatically after a pre-determined time.
Combine All Three for Maximum Savings
Lighting controls that combine maintained illuminance, daylight linking and presence detection will maximise energy savings, in some instances in excess of 70%. When the area is occupied the luminaire output will be reduced due to levels of ambient light. Even during the short winter days there can be sufficient daylight for the luminaires to dim, providing energy savings throughout the year. Thorlux Smart controls provide energy savings by combining maintained illuminance, daylight linking and presence detection in a system that can be tailored to suit requirements.