How Does an Edge-lit LED Panel Light Work

The 2 foot and 4 foot lighting fixtures have been illuminated with linear fluorescent lights for a long time. Fluorescent troffers are a common name for these lights. The AC bus wires above the suspended ceiling are wired to the troffers. The light created by the lamps can be shaped by a fluorescent troffer using components like a sheet metal enclosure, a fluorescent ballast, fluorescent lamps, and optics to create a visually pleasing light for the area in which it will be used.

All over the globe, commercial buildings and industrial settings frequently have lighting fixtures in the troffer style. Nevertheless, the problem of relatively high power consumption is caused by the conventional fluorescent tubes' relatively low power factors and short life cycles, which range from 3,000 to 4,000 hours. In addition, the refuse stream is drawn in by the removed lighting fixtures or components for disposal or recycling.

As a result of the toxic or hazardous materials in the removed components, including PCBs in the ballasts and mercury in fluorescent lamps, disposal raises significant environmental concerns. As a result of LED's advantages in terms of high efficiency, low power consumption, high reliability, quick response time, and low failure rate, the lighting business and academia devote time and effort to expanding lighting applications with LED.

The use of light emitting diodes (LEDs) in general lighting fixtures for places like conference rooms and offices is becoming more widespread. An innovative lighting device in recent years is the LED flat panel light. A significant part of the commercial, office, and retail space has suspended ceilings. An LED panel light is made to provide enough illumination to take the place of the existing fluorescent fixtures with varying lux levels.

Direct-lit backlight modules and edge-lit modules are two of the main types of lighting panel designs. A group of LED light sources that are placed immediately underneath a panel make up a direct-lit LED panel. But keep in mind that LEDs are a type of directional light source whose Lambertian light output strength is highest at 90 degrees. Since LEDs are pointed directly at the light diffusing layer, the light they emit shines straight onto the layer.

It consequently produces a point source of light that may be bothersome or damaging to someone's vision. Hot spots (i.e., the region with the highest light output intensity) can be seen in a direct-lit light panel with the diffuser layer placed too close to the LED light sources. The development of edge-lit LED panel lights is founded on achieving a fixture that generates a light output that, to the human eye, appears uniform across the diffuser panel by balancing the relationships of the aforementioned factors.

Light is transmitted from an LED array to the central area of an edge-lit panel through light guides in modern LED flat panel lights built primarily using the edge-lit backlight theorem. The use of edge-lit LED panels in interior lighting fixtures is rapidly gaining popularity. It is now feasible to find a substantially flat LED panel with edge lighting, enabling thin panels with adjustable length and breadth that produce uniform light.

The lighting fixture and related retrofit tools provide a tool with a tonne of installation flexibility. By incorporating one or more diffuser components, edge-lit LED light panels can produce an ambient white that covers the entire front face of the panel evenly. In general, an LED panel can be split into a frame and light emitting components that are enclosed by the frame.

The aluminium frame supports the structure, contains the LED panel's parts, including the LED strips and power circuitry, and dissipates heat. A light guide panel has several SMD LEDs placed next to two or more of its sides. Edge illumination uses SMD2835, SMD5630, SMD3014, SMD4014, and other SMD light sources.

There are known edge-lit LED panel lights that link light to a planar light guiding panel's edges. (waveguiding medium). The light is propagated through the complete volume of the medium by total internal reflection before being released from a light-emitting face. In order to guarantee that the light emanates from the LGP's front face, light from the LEDs enters the LGP's edges and is redirected internally.

A reflector can be placed on the panel's back surface to redirect light that would typically exit the panel's back surface towards the front surface. The back face of the panel, which is the face opposite the light emitting face, will frequently add a light reflective layer in order to reduce light emission from the rear face.

One or both faces of the light guiding panel may have a surface pattern made up of a surface roughening that disrupts the light guiding properties of the LGP at the site of the area generating a preferential emission of light at the area in order to enable a uniform emission of light. The light will move inside the waveguide as soon as it penetrates.

The quantity of light that will exit from the waveguide's edges can be controlled by attaching diffusers and/or reflectors to the edges other than the one that is exposed to the light source module. In order to direct the light from the waveguide's main planar surfaces in a diffuse or angled way, features on the waveguide may be used. To extract diffuse light, characteristics like laser etching, chemical etching, and shape painting are currently used.

Microlens light distribution features can be used as an option to offer a more specialised and personalised light output. The diffusing panel is typically made of translucent plastic or light-transmitting plastic with a consistent surface design to enable even light emission. To avoid any unevenness, the diffuser may be manufactured from a mixture of diffusing agents.

In order to eliminate hot spots, the diffuser's compounded diffusing substance may scatter the light from the LED light source. To guarantee that the light distribution for the LED panel is Lambertian or very close to Lambertian, diffusers made of poly (methyl methacrylate, or PMMA), polycarbonate, and/or polystyrene are used in LED panels.

Using a reflective material or reflector located on the back of the light panel, light that has been evenly dispersed across the panel will be diffused and directed through the panel into the area to be illuminated. A waveguide or light pipe function can be used to direct light from edge-lit LEDs towards the centre of the respective panel, which can help ensure uniformity of the light generated by LED light panels.

Office illumination environments predominately use LED light panels. Since a variety of human needs must be met by workplace lighting. A workplace's lighting can therefore be judged to be of good quality if it makes it easy and comfortable for employees to perform their visual tasks. Parameters like lux for luminosity, CRI for colour rendering index, and Visual Comfort Parameter (VCP) for glare are used to evaluate the light quality.

Recently, the International Commission on Illumination's (CIE) Unified Glare Rating (UGR) recommendation has gained widespread acceptance as a standard glare evaluation method. Although edge lighting panels have many advantages, some of them are their uniform illumination, streamlined design, and thin silhouette. However, edge-lit LED panel lights have the drawback of ineffective UGR management.

Glare formation is a result of insufficiently controlled UGR, which can be very dangerous in big spaces. This is especially true for sizable rooms, such as meeting rooms, used in workplaces. Uncomfortable glare can result from UGR values greater than 20, especially in the workplace or room settings mentioned above.

Therefore, edge-lit LED panels used in workplaces are prefered to have a UGR of 19 or lower. For edge-lit LED panels, increasing luminous efficacy represents yet another hurdle. Luminous efficacy is the quotient of the total luminous flux generated by the LED panel light and the total power input it gets. It is defined as the ratio of luminous flux (Lm) to applied power (Watts). The measurement unit is lights per watt (lm/W).

Because of light losses within the light guiding medium, losses in coupling light into the medium, and losses in extracting light from the medium, edge-lit lighting panels have a poorer luminous efficacy than a direct-lit configuration. Edge-lit LED luminaires emit reflective light with luminous efficacy typically between 80 and 100 lm/W, as opposed to direct-lit panels that emit directional illumination with a luminous efficacy as high as 160 lm/W.

As was already mentioned, one major benefit of an edge-lit LED panel lamp over a back-lit or direct-lit panel lamp is that it is much more compact. In particular, the overall thickness of the lamp can be similar to the thickness of the light-guiding panel, making it possible to construct a panel with a thickness of 8–12 mm.

Additionally, the LED panel can be any dimension. For instance, the LED panel could be square and measure about 24 inches by 24 inches (600 millimetres by 600 millimetres), which would be the lower dimension of a standard fluorescent ceiling troffer. Due to their broad range of sizes, they are more flexible and can be used for a variety of applications. The aluminium chassis can be given a thermoplastic anti-static coating.

The frame's silver or white colour blends better with both residential and business ceilings, and it is also corrosion and scratch resistant. External constant current drivers with the option of dimming usually power LED panel lights. They appear in regular, DALI, and analogue versions, as well as various colour temperatures.

They can be surface mounted to ceilings and walls, used as pendants, or fitted straight into standard suspended ceilings and recesses. Its high performance combined with low energy consumption, a long lifespan, and a sleek design make it the best option for general purpose lighting in office buildings, large retail establishments, educational institutions, the government, healthcare, and hospitals.

Round Panel Light Led

Feature:

● Very slim housing
● Low installation depth
● High luminous efficacy
● Energy savings up to 60 % (compared to luminaires that use CFL lamps)
● Very homogenous light
● Functional design
● Easy installation with fast connection (connector box with push wire terminal for tool-free connection)
● Simple installation thanks to integrated driver

Specification: