Variable lighting can help one fixture support more than one operating condition. The control method must remain compatible with the LED driver, electronics, sensors, and optical requirements of the system.
Application Requirements
Why Adjust Industrial Lighting Output?
Machine setup may require one lighting level while automated inspection requires another. Workstation operators may also need to adjust local illumination according to the task and reflective properties of the parts being handled.
Driver Compatibility
Dimming Begins With the LED Driver
The driver must support the intended control method. A fixture should not be assumed to accept arbitrary dimming signals simply because it uses LEDs.
Driver behavior, minimum output, wiring, control interface, electrical noise, and response time should all be considered.
LED Drivers →Operator Controls
Manual Adjustment
Local controls can provide an operator with direct adjustment at a workstation or machine. The control should be placed where it can be reached without interfering with production or maintenance.
Machine Vision
Controlled Intensity for Inspection
Inspection systems may require a defined illumination level to produce consistent image contrast. Adjustable output can support setup and process optimization when integrated with compatible lighting electronics.
Inspection Lighting →Automation
Changing Output From Machine Logic
Different machine states can command different lighting levels where the electronics are designed for external control.
This can allow one lighting assembly to support production, inspection, access, or service modes.
Thermal Considerations
Electrical Output Changes Thermal Conditions
Operating LEDs at different electrical levels can change the heat generated within the light source, driver, and enclosure.
Thermal design should still be based on the expected worst-case operating condition.
Selection