LED lights are commonly in our daily lives, we can notice it everywhere, even touch it to feel the lighting in our hands. There are many kinds of LED lamps we should recognize when we intend to make a lighting project. For an indoor lighting project, we may apply LED lamps including led downlight, led freestanding lights, led track lights, led ceiling lamps, led mirror lamps and led panel lamps, etc. Under the LED lights of each big category, there are different sub-categories. We take the LED panel lights about the sub-categories for example in this text.

The sun is the source of most natural UV light. Nevertheless, only approximately 10% of the sunlight is UV, with a mere one-third penetrating the atmosphere reaching the Earth. On the other hand, 95% of the sun’s UV energy reaching the equator is UVA and 5% is UVB. The Earth’s surface does not attain measurable UVC from solar radiation, as ozone, molecular oxygen, and water vapor entirely absorb shorter UV wavelengths in the upper atmosphere. A suntan is a biological response to UVB exposure. In essence, the tan comes from a natural defense mechanism of the body. This is the melanin pigment that is produced by skin cells known as melanocytes. UV radiation is absorbed by melanin, which then radiates as heat. When the body senses solar damage, it sends melanin and tries to protect it from further harm. The pigment darkens the skin.

Lighting Source： The straight-down LED backlight performs better. It allows for dynamic area control of the LCD TV. The straight down backlighting process is relatively simple and does not require a light guide. The light source (LED wafer array) and PCB are placed at the bottom of the backlight, and the light is emitted from the LEDs through the reflector at the bottom and then evenly through the diffuser and brightening film on the surface.

Uniformlight meaning

UPSHINE back-lit LED panel directing lighting is mostly applied in office lighting, school lighting, commercial lighting and another occasion like hospitals, laboratories and dust-free workshops, etc.

LED panels are divided into straight-down led panel lamps and side-lighting led panel lights. How to distinguish both lights while we install of them for the suitable application? For this, we need to distinguish them from thickness, brightness, heat dissipation lighting source, etc.

Table of ContentsThe Thickness between Direct Lighting Panel light And Side Light Source Panel LightThe Brightness Difference Between Straight Down Panel Light And Side Entry LightThe Lighting Source Of Both LightSide-Lit Led Panel Lighting’s Source And StructureStraight Down Led Panel Light’s Source And StructurePL-CK LED Panel Direct LightingWhere Is Back-Lit LED panel Direct Lighting mostly put into use?

UPSHIE is a professional and quality manufacturer in producing products for their clients. The following link is UPSHINE's back-lit penal LED light’s production video.

Ultraviolet radiation is found between visible light and X-rays in the electromagnetic spectrum. UV light has wavelengths ranging from around 10 to 400 nanometers. Violet light has a wavelength of 400 nanometers. Ultraviolet radiation has a frequency range of 800 to 30,000 terahertz (THz). This is invisible to the naked eye, because as we learned in the last installment of Electromagnetic Spectrum 101, visible light only reaches to around 790 THz.

The reason for the weaker luminous effect of the side-light panel light compared to the straight-down panel light is that the refraction path from the light source to the final light effect needs to go through many ways, and the light will be lost to a corresponding degree in each conduction path so that the luminous effect is often slightly less.

The lighting way of the side light flat panel lamp is glowing all around, which lighting through the light guide plate of high transmittance, then forms a uniform plane luminous. Compared to the side light flat panel lamp, the straight down panel light’s lighting way is that the LED lamp is directly illuminated through the diffuser plate with suitable thickness to eliminate the space of brightness needed. Therefore, the power and thickness of straight-down lights are higher than the side light source panel light.

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Generally, the side entry panel lights are thinner than the straight-down panel lights, the former thickness only 8.85mm which is the thinnest one in the market. There is the principle of the thickness of both types below.

UPSHINE PL-CK LED panel direct lighting is a direct lighting product with high lumen efficiency. It makes full use of all light and is more cost effective compared with side lighting LED panel light. Adopt an optical lens to offer a uniform light effect. And with integrated iron plate,providing great thermal management.

Light Source: The side light LED backlight can only achieve simple one-dimensional dimming, as its luminous brightness and uniformity are not ideal and when applied to large and medium-sized LCDs, the weight and cost of the light guide plate will increase with the size and it is difficult to achieve dynamic control of the LCD area.

Ultraviolet light is a form of electromagnetic radiation that causes summer tans. However, UV radiation is harmful to live tissue when exposure is excessive—hence, sunburns. Electromagnetic Spectrum 101 returns with the next chapter of “Raging Martians Invaded Venus Using X-Ray Guns,” this time focusing on Ultraviolet radiation.

Structure: Side-lit LEDs are backlight structures in which the light source is a linear or point light source set on the side of a specially designed light guide plate made into a backlight. The overall structure is compact, as the following picture shows：

Advanced illumination

Now that you’ve learned a little bit about UV light, what it does, and how it affects us, check back in next time for Electromagnetic Spectrum 101: X-Rays. And if you’d like to be able to measure light for yourself, check us out right here at Gamma Scientific for all your light testing equipment needs.

The brightness of the straight down flat panel light has an advantage over the side light type flat panel light, straight down flat panel light lumen index easily reaches 4200LM or more.

In the presence of ultraviolet radiation, chemical bonds will break. UV photons can promote ionization, a reaction wherein electrons detach from atoms, due to higher energy. The vacancy that results has an impact on the chemical characteristics of the atoms, causing them to establish or break chemical bonds that they would not have formed otherwise. This may be useful for processing chemicals or harmful to other materials and living tissues. This damage can be beneficial in some cases, such as sanitizing surfaces, but it can also be damaging, especially to the skin and eyes, which are the most vulnerable to higher-energy UVB and UVC radiation.

Structure： The advantages of straight-down backlight technology are high luminance, good viewing angle, high light utilization efficiency and simple structure. The space between the diffuser and the LED light source improves the uniformity of luminance. The number of light sources, luminous brightness, and power consumption are all greater than those of edge-lit backlighting, as the thickness, weight, and power consumption of the module are increased.