LED Light Components: What is an LED Light Made Of?

Various LED light components work together to produce light, regulate it, provide a cooling effect, and so on. To help you understand them and their functions, we delved into the anatomy of today’s most used fixture, the LED lamp. We will also discuss the construction of other diode-based fixtures, such as strips and panels.

What is an LED Light Made Of?

The heart of any LED light is a semiconductor material. A semiconductor is a material that conducts an electric current under certain conditions. It can also allow current flow in one direction only.

The material used depends on the required color. Options include gallium nitride for blue, indium gallium for red, green, and yellow, or aluminum indium phosphide for orange, red, and amber.

The semiconductor devices are usually embedded or mounted to a substrate, which can be rigid or flexible. Again, options include chip-on-board (COB) surface-mount-device (SMD, and dual-in-line (DIP).

The chips are resin-encapsulated for protection. When creating white, the diode packages require a phosphor coating. They are then placed in housing, covered with plastic, and supplied with a control circuit and installation parts.

LED Light Components

Many LED-based products today are designed in the shape of the traditional bulb. Because it’s the most prevalent, we will explore the components based on this design. With that in mind, here’s a list of parts that make these lamps operational.

LED Packages

The light-emitting parts comprise semiconductor chips (diodes). The chips, typically placed on a PCB, are supplied with a metal core to conduct heat away effectively. When provided with a voltage and current, they emit visible light which is either white or colored.

Power Supply PCB

The circuit board, or PCB, is the part that controls power as it goes through the chip packages. It contains circuits that send current to the semiconductors. In most lamps, the circuit board includes the electronics needed to perform various tasks, such as dimming, pulsing, etc.

Heat Sink

LED light components include heat sinks. This component has a high thermal conductivity. The higher conductivity helps it quickly draw away heat and conduct or dissipate it. In high-power systems, the heat generated can cause damage, making heat sinks necessary components.

Housing and Base

The housing (or body) encloses various parts, including the driver PCB and heat sink or other parts, protecting them while also shaping the lamp for design and aesthetics. Next to it is the base or socket, which usually has a screw-like design to allow installation. It can also be a plug-in type.

Diffuser or Optics

The lens or diffuser is the translucent plastic cover placed above the lamp assembly. Usually removable, it diffuses light, helps reduce glare, and makes the fixture comfortable for the eyes. This part can also direct the beam and give the fixture its characteristic bulb shape.

Wiring and Connectivity Components

Wires transfer current from the power supply or source to the required parts. They may also carry signals. Electrical connections make contacts and serve a similar function, especially when you place a bulb in an installation socket.

Are All LED Lights the Same?

They are not. Variations occur in their design, shapes, sizes, and application specifications. Some have integrated driver circuits, while others do not and rely on external drivers.

Some bulbs may resemble incandescent or fluorescent lamps, while others are unique, like strip lights. In terms of size, the fixtures used in homes are smaller and meant to fit in the available sockets.

Commercial or industrial fixtures are large, and their parts are more elaborate. Their construction usually includes heat sinks. In higher-load applications, they may even have fans to cool them.

Types of LED Lights and their Structures

The LED light components we discussed are for luminaires that look like the traditional light bulb. Although most parts are similar, some may not. To give you an idea of the differences, here is a look at the construction of various versions of the modern-day diode-based fixtures, including the bulb.

Light Bulbs

Many lamps for general-purpose illumination are this type. They have round or globe-like covers enclosing the light-emitting component. They can also be cylindrical or other shapes. The base is usually a screw-on or plug-in part to fit standard receptacles.

Light Strips

They are typically long, slender, and flexible strips with surfaced mounted or built-in light-emitting diodes or semiconductor chips. They also usually come in rolls with an adhesive backing for easy installation onto walls, furniture, and other surfaces.

Panel Lights

Panels rectangular or square fixtures with the chip packages arranged in an array beneath a flat diffuser. They provide wide-area illumination, making them suitable for outdoor security lamps or commercial and industrial settings illumination products.

Can You Replace LED Light Components?

While you could, manufacturers do not design these light sources with replaceable parts, especially consumer-grade types. The parts you see on sale today are not replacements. Manufacturers mainly design them for assemblers or DIY enthusiasts.

Furthermore, some fixtures, such as strips, may have the components built into their structures. You cannot change these if they get damaged. That said, you can fix faulty lamps by changing individual electronic components.

As an exception, large industrial or custom-made lights may have replaceable parts. These are specialized lights whose drivers and chip arrays manufacturers can make upon request.

As an exception, large industrial or custom-made lights may have replaceable parts. These are specialized fixtures whose drivers and light-emitting arrays are available from the manufacturer upon request.

Conclusion

Diode-based fixtures come in various designs and other differences. In this article, we discussed the LED light components of bulb-like lamps. These are the most popular, mainly used in homes and outdoor or commercial places for general illumination. Other options that may use different constructions include panels and strips.