Learn about LED dimming systems

2019-09-13

Many consumers are often concerned about the dimming function in their lighting. As LED lights become more popular with these consumers and other businesses, electrical and lighting professionals must understand the capabilities of these energy-saving systems and fixtures. LEDs present a unique set of challenges in dimming.

Dimming is very important

LED lights have saved users a lot of energy. When the light source dims, it not only saves extra energy, it also improves the environment, and many companies rely on these atmospheres to please customers and generate revenue. According to LEDS magazine, LED lighting saves energy in a 1:1 ratio, which means that if the system is dimmed to 50%, it will consume half the energy.

LED dimming working principle

In order to develop an LED dimming system, an electrician must determine the controller, driver, and LED source before starting. Because of the current required for LED operation, it is not as simple as adding a dimmer.

When studying LED systems, it is important to understand the dimming function of the drive. Industry standards are turning to 0-10 volts, but this is not always the case, so research is needed to ensure proper control of the system. The most common driver is an analog driver with two pairs of wires: Class 1 wiring, 120/240 / 277V line voltage switch, Class 2 wiring, low voltage dimming control, such as wall switches. The Type 1 wiring controls whether the drive is turned on or off, and then the Type 2 wiring sends a voltage signal to the driver. In the long run, simulations may be more cost effective, depending on the project at hand. However, if the wiring is wide, it may result in a low signal.

There are also digital connections and addressable drivers for LED dimming. These do not require wiring because the digital interconnect system is responsible for delivering signals to the LED drivers. The Digital Address Lighting Interface (called DALI) allows users to control multiple fixtures using a single software platform. This option is usually easier to install and design.

What to consider

If electrical and lighting professionals do not match the system components when installing the dimming system, the final product may beep, flash or turn off faster than the preferred product. Flashing may be caused by inconsistent voltage or circuit overload, but is usually caused by improper switch selection.

When choosing an LED dimming option, the electrician must consider the customer's requirements for dimming performance, the intended application within the space, and the amount of control the user needs on the dimmer. For example, a large facility that wants to install an LED dimming system in a parking lot can choose an analog drive because consistent light is not as important as a restaurant or retail store. The restaurant manager may decide not to use the simulator, as it may be more difficult to replace the wiring if the site is refurbished or reused or if the lighting settings need to be changed.

If the customer has an analog drive, the electrician must find the correct LED controller to match it. This information is typically provided by the illumination produced by the dimmers tested for its products. In more complex systems, it is necessary to participate in dimming systems and lighting manufacturers to ensure a free system that works together.