FAQ

Energy saving, Drivers and control system

• Why do LEDs require power supply / drivers?
• What are there different types of LED power supplies / drivers?
• Typically, what sort of applications are constant current drivers used for?
• Typically in what sort of applications are constant voltage drivers are used for?
• How do I know what type of driver is required by LED product?
• What is Vf?
• What is the maximum permissible distance between an LED product and a remote driver?
• What are the advantages of 24V LEDs over12V LEDs?
• Is it true that some LEDs can be directly connected to the mains voltage power?
• What precautions are to be taken when mounting LED drivers?
• How are LEDs dimmed?
• What are the relative advantages of PWM dimming?
• What are the disadvantages of PWM (pulse width modulation) dimming?
• In which applications is CCR (constant current reduction) dimming is most suited?
• Can mains voltage LED products be dimmed with traditional incandescent dimmers?
• What are the advantages of dimming LEDs?
• What are the various control protocols that can be used for dimming LEDs?
• What is the difference between analogue and digital dimming?
• What lighting protocol is appropriate for an application?
• Why do some LEDs flicker when dimmed or turned off?