What do you know about LED panel lights?

The previous fixtures were like this:

Later, the lamps appeared like this:

Is this the "thinly futuristic future" sung in a small public song?

Technological innovation and economic development have unwittingly changed people's lives. The protagonist to introduce today is one of them: LED panel light.

The flat panel lamp uses a unique SMD patch as the light source, plus a light guide plate and/or a diffuser plate, so that the ultra-thin design of the panel lamp not only provides illumination, but also adds artistic beauty.

At present, the main use occasions for flat lamps are office lighting, classroom lighting, hospital lighting, and hotel lighting.

When LED lighting was just emerging, the traditional fluorescent light source T5 and T8 grille lamps were the main competitors of flat panel lamps. As the price of flat panel lamps is close to the traditional grille lamps, the market competitiveness of LED panel lamps is fully reflected. LED panel lights are becoming more and more popular as replacements for traditional grille lamps and milk whiteboard lamps.

Figure: LED panel light and traditional grille light shape comparison

According to the shape: the flat light can be divided into square, rectangular, round, outer round and so on. (Usually the same as the shape of a traditional grille lamp, is it a replacement?)

According to specifications: 300mmx300mm, 300mmx600mm, 300mmx1200mm, 600mmx600mm. (These are the basic modulus of space. Hey, what is the modulus? Go out and turn right before you ask.)

According to the installation method: mainly flat type (T-shaped keel), embedded (opening), buckle type (triangle keel); hanging type and ceiling type. (Hey, what is the keel? I really want to know, please leave a message, the next article introduces the keel and modulus.)

According to the light-emitting method: there are mainly two kinds of side-emitting flat-panel lights and back-illuminated flat-panel lights (straight down type). (That is, side-in and direct-down, hey, forbidden association.)

Take the following products as an example to see a few installation methods:

There are also different ways of lighting, first look at the difference in shape, then specifically introduce the advantages and disadvantages:


Second, the advantages and disadvantages of side-emitting and back-illuminated panel lights

Side light panel light

The side-emitting panel lamp is mainly composed of a frame bracket, a diffusion plate, a reflector, a light guide plate, a drive, and a light bar.

At present, the main light guiding materials are PS (Polystyrene) polystyrene, PC (Polycarbonate) polycarbonate, and PMMA (polymethyl metha crylate) (polymethyl methacrylate) acrylic material.

The shortcomings of the side-emitting LED panel lights are mainly:

First, energy efficiency is low. It is not difficult to imagine that the LED should be placed around the light guide through the light guide plate, and the lead-out efficiency is lower than that of the direct type, resulting in lower overall energy efficiency.

Second, the quality of the light guide plate is high. If the design is not good, there will be a middle bright, dark sides, or bright edges on the light side, or inconsistent brightness at different angles, affecting the quality of the lighting. (If you want to do something good, you must first sharpen your tools, the products must be done well, the materials must be in place, how does the Tongrentang pair of couplets say?)

Third, the reliability can be relatively poor. Since the light guide plate, the reflective ink and the reflective film in the side-emitting panel lamp are always at a relatively high temperature, it is easy to age and turn yellow, resulting in a decrease in the light extraction rate, and the life of the lamp is greatly reduced.

2. Back light panel light

The back-illuminated panel light is a direct-down type, and the light source is evenly distributed behind the diffuser plate, and is directly taken down.

The back-illuminated LED panel light has the following advantages over the side-emitting LED panel light:

First, energy efficiency is high. The emitted light is directly irradiated through the diffuser plate, which improves the system energy efficiency of the lamp. (The advantage of going straight is that it is efficient.)

Second, the cost is low. The cost of the light guide plate is saved, the cost of the lamp is reduced, the internal space is large, and the design is more flexible.

Third, the lamps are light. The quality of the luminaire is reduced because the light guide is omitted.

Fourth, the reliability is high. We know that in the design of the luminaire, the performance of each component and the materials used will determine the performance of the luminaire, the components will increase, and the reliability will be reduced. So if you use a better quality (note, this is the premise) diffuser, the luminaire can guarantee a long life.

Is there really a product with advantages and no disadvantages? Then everyone is using the direct type, what side-entry type? As the saying goes: sugar cane is not sweet at both ends.

The main disadvantage of the back-illuminated LED panel light is that it cannot be made too thin. the reason is:

First, there must be a certain distance between the light source and the diffuser plate, otherwise the light-emitting point will be visually observed. (So ​​it is often unacceptable to go straight.) This will inevitably lead to an increase in the thickness of the luminaire, which will increase the cost of the luminaire casing. (That is as thin as a futuristic future, can not afford to dismantle.) And the thickness increases, it increases the transmission of light, so that the energy efficiency of the luminaire is reduced, you need to find a way to overcome.

Second, since the lamp bead is fixed on the back plate, if the back plate uses a whole piece of aluminum substrate, the cost will be high. If a strip-shaped aluminum substrate is used , fixing and positioning are another problem.

Third, LED panel lights should be expected

Finally, we use a sentence to look into the future.

No, I want to say three things:

First, market acceptance has gradually increased, and market sales have gradually expanded. LED flat panel lights have been sought after by the market because of their ultra-thin. Flat-panel lamps should use their own characteristics and advantages to meet the practical needs and maximize the energy efficiency of the light source. The ultra-thin and personalized design of the lamps can be used in the future general office lighting and commercial lighting market. Occupy a place.

Second, various functional customized LED flat panel lamps will appear. With the advancement of LED drive technology and the development of intelligent systems, the development of LED panel lights will also be diversified. A series of new products such as dimming LED panel lights and color-changing LED panel lights will gradually be sought after in the market.

Third, the problem of difficult maintenance will be solved. Different from the traditional fluorescent light grid lamp, if the light source is broken, the whole light fixture should be replaced, and the maintenance cost is relatively high. This is a common problem faced by all LED luminaires. I believe that with the advancement of technology, there will be corresponding solutions.

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