KingOrnan Lighting Academy Series Article 1: Full Spectrum

Show the color temperature changes of sunlight from 6 AM to 5 PM every hour.

Miniaturization of lighting, “see the light but not the fixture,” and full spectrum are common popular terms in the industry. What do these terms mean? Are they good or bad? In fact, everything has its pros and cons. Whether doing business, tasks, or acquiring knowledge, one needs to see both sides.

KingOrnan Lighting Academy Series Article 1: Full Spectrum

The Concept of Full Spectrum

Today, we will focus on one term: full spectrum. Prepare your notebooks and pens to take notes because you might not remember everything after reading.

Do you know how many types of spectra there are? Our LED spectrum, solar spectrum, energy-saving bulb spectrum, metal halide lamp spectrum, incandescent bulb spectrum, xenon lamp spectrum, and even the candle spectrum are all different. What is the standard for the concept of full spectrum? The first term to remember today is “Sun.” All standards refer to the sun, so the full spectrum also refers to the solar spectrum. This is the first key point: the sun. In the future, when we use light, we must refer to the sun, so the full spectrum is based on the solar spectrum.

Color Temperature of Sunlight

A peaceful morning landscape with the sun rising over the horizon, casting soft and warm light.

Morning Sunlight

What is the color temperature of the rising sun at the horizon in the morning? Is it 2200K? No. Is it 1500K? No. The correct answer is around 1700-1800K. This is because the color temperature of the sun just rising is actually red light, about 1700-1800K.

Noon Sunlight

What is the color temperature of the sun at its brightest at noon? Is it 4000K? No. Is it 6000K? Almost. The whitest is about 6400-6500K.

The spectrum of sunlight ranges from 1700K to 6500K, so our full spectrum also ranges from 1700K to 6500K, referring to the solar spectrum.

Someone asked, can I make a full spectrum of 9000K? Yes, but that does not belong to the full spectrum because the solar parameter standard value is between 1700-6500K. So, the range of the full spectrum is 1700-6500K.

Example of Full Spectrum LED

Currently, what does the best full spectrum LED look like? Please see the picture below. This image is very close to the full spectrum, but if you look closely, how about the blue light? Isn’t it very high? Many people do not know what the full spectrum is; they have only heard of it. In fact, the full spectrum refers to the solar spectrum.

Blue Light in Full Spectrum

A spectrum chart of a full-spectrum LED light bead that closely matches the solar spectrum, with three peaks in the blue light range.

Since the full spectrum is based on the solar spectrum, the blue light it contains also refers to the solar spectrum. Many people may misunderstand and think that the blue light in the full spectrum should be low, but in reality, the blue light value in the full spectrum is quite high. We can understand this more clearly through a full spectrum chart.

Three Blue Peaks

Look at this chart and observe the blue light part of the full spectrum chart closely. You will find three obvious blue peaks on this full spectrum chart. Many other spectra do not have this characteristic, and a spectrum with three blue peaks is the best in the full spectrum. Currently, not many manufacturers can produce such a full spectrum chip, and many brands on the market may not be able to produce this spectrum.

So, if someone tells you that their full spectrum is low blue light, that is actually a misconception. The blue light in the full spectrum is relatively high, not low blue light. This is the first key point.

The Benefits and Drawbacks of Blue Light

Many people believe that the blue light in full spectrum lighting can be harmful to the human body. However, blue light is also present in sunlight, and it’s not necessarily harmful. For example, blue light can be used to treat jaundice, is used in nail lamps, and can even attract mosquitoes and insects. Blue light has many benefits and shouldn’t be immediately considered harmful.

While full spectrum lighting does contain higher levels of blue light, this does not mean it is harmful to the human body. We need to understand the role of blue light from multiple angles. In some contexts, blue light can be beneficial.

Because, besides the conventional spectrum, the sunlight spectrum also contains ultraviolet rays, infrared rays, X-rays, cosmic rays, etc. Of course, some things can be removed, but if you remove blue light, it is no longer a full spectrum. So, we need to understand the true meaning of the full spectrum.

The full spectrum has grades, just like table lamps on the market have A1, A2, and A3 levels. Currently, the highest full spectrum has reached the A4 level, equivalent to the sunlight around 6 am. This spectrum is warmer and is the best full spectrum.

A4 Level: Equivalent to dawn sunlight.
A3 Level: Comparable to sunlight at 8 am.
A2 Level: Similar to sunlight at 10 am.
A1 Level: Similar to sunlight at 12 pm.

Applications of Full Spectrum

The full spectrum is a spectrum infinitely close to sunlight. Can everyone understand this point? Because it is close to sunlight, it is called the full spectrum. This is the easiest thing to understand.

However, here comes the question: does everyone know how to use the full spectrum in home lighting? Is it good or bad? For example, when the color temperature is 1700K, can you sunbathe for an hour? Even 1900K, 2000K sunlight? But at noon, when the color temperature reaches 6400K, can you still sunbathe? Can you sunbathe? Dare to sunbathe?

So, we must understand the issues in applying the full spectrum. The concept of the full spectrum is infinitely close to sunlight, but the full spectrum in the morning and the full spectrum at noon are different. Sunbathing with the full spectrum in the morning is no problem, but what about the full spectrum at noon? With the current weather in Guangdong, dare to sunbathe for an hour at noon? Dare to sunbathe under the sun for an hour? That is impossible.

The Relationship Between Light and Life

A peaceful morning landscape with the sun rising over the horizon, casting soft and warm light. The sky transitions from night to day, reflecting the natural rhythm of life and emphasizing the essential role of light in regulating our biological clock and health.

Light is one of the three essential elements of life, the other two being water and air. These three elements are crucial for maintaining and developing life, so light plays an extremely important role in our lives. Light is not only a source of daily illumination but also a key factor in regulating our biological clock and body functions.

Our daily life rhythm is closely related to light. Rising with the sun and resting with its setting is not just an ancient lifestyle but also a schedule that aligns with our natural body rhythms. In the morning, when the sun rises, sunlight makes us feel refreshed and energized, ready to start a new day of work and study. This is because light can stimulate our retinas, transmitting visual signals to the brain, thereby adjusting our biological clock, enhancing our mental state, and keeping us alert and focused during the day.

At night, as the sun gradually sets and light diminishes, our bodies begin to enter rest mode. This is because a dark environment helps the pineal gland secrete melatonin, a hormone that promotes sleep and helps us enter a deep rest state. Therefore, light not only affects our vision and mood but also directly impacts our health and quality of life.

Lighting Applications in Active and Quiet Zones

In home design, we can divide spaces into active zones and quiet zones. Active zones refer to areas with high activity levels, including the living room, dining room, hallways, balconies, bathrooms, and kitchens. These places are frequented by family members and require bright, clear lighting with high color temperature and high illuminance to support various daily activities. Therefore, using full spectrum lighting in active zones is very suitable. Full spectrum lighting can provide illumination effects close to natural light, making people feel more energetic and visually comfortable. For example, in the living room and dining room, bright full spectrum lighting can make family gatherings and meals more enjoyable and relaxing; in the kitchen, full spectrum lighting can help us better prepare food, ensuring safety in operations.

Quiet zones, on the other hand, are areas for rest and relaxation, such as the bedroom. These places need soft, warm lighting to help us relax and fall asleep. Full spectrum lighting is not recommended in quiet zones because the high blue light content in the full spectrum can inhibit melatonin secretion, affecting our sleep quality. Melatonin is a hormone secreted by the body at night, helping us enter a sleep state. If full spectrum lighting with high blue light content is used in quiet zones, it will lead to insufficient melatonin secretion, making it difficult for us to fall asleep and affecting our mental state the next day. Therefore, low color temperature, low blue light auxiliary sleep lighting, such as warm-toned desk lamps or bedside lamps, should be used in quiet zones to create a comfortable and relaxing sleep environment.

By scientifically and reasonably planning the lighting applications in active and quiet zones, we can fully utilize the characteristics of lighting to improve the quality of life and promote health. This is not only the application of lighting knowledge but also our pursuit of

quality living. I hope everyone can better understand and apply these lighting knowledge in future life, creating a healthier and more comfortable living environment.

Technical Details of Full Spectrum Lighting

There are many misconceptions about full spectrum lighting, such as the belief that a high color rendering index (CRI) equates to full spectrum. In reality, full spectrum lighting includes a high CRI, but a high CRI alone does not define full spectrum. In future lessons, I will provide detailed explanations on CRI, how to measure spectra, and the use of different chips to help you be more competitive in business.

The spectral range of full spectrum lighting typically spans from 380 nanometers to 780 nanometers, including both ultraviolet and visible light. Most common LED lights on the market are activated by blue light, with only educational lighting sometimes using violet light activation. This is because violet light activation causes less eye strain, though it is more expensive and used primarily for high-end needs.

Currently, only a few brands, such as Seoul Semiconductor, use violet light activation technology. Most other brands use blue light activation due to its lower cost and mature technology. However, violet light activation has advantages in specific scenarios, particularly in environments that are friendly to children.

Selection and Application of Chips

how to choose

To achieve good light output, the light source chip is very important when choosing lighting fixtures. Understanding the underlying technology of the chip is crucial when selecting lighting chips. Each brand’s chip has its unique technical characteristics and application advantages. For example, Citizen chips are known for their high quality and unique optical performance, standing out in high-end lighting products. Citizen chips are supported by Nichia’s underlying technology, making them far superior to other brands in terms of clarity and three-dimensionality.

In contrast, other brands of chips on the market, such as Cree, Osram, and Sanan, although priced differently, all use the underlying technology from the same company, just with different brand names. These chips have no essential differences in technology and performance, only differing in brand effect and market positioning. 

For high-end needs, I recommend using Citizen chips. Although these chips are more expensive, their performance and quality are unmatched, providing a significant competitive advantage for your products. In the future, we will launch High-end spotlights and magnetic track light fixtures using Citizen chips, which will far exceed other brands in terms of light quality, clarity, and three-dimensionality. KingOrnan will offer these high-end products at reasonable prices to help you enhance competitiveness in the market.

KingOrnan aims for long-term cooperation to help you succeed in the market. Therefore, for high-end products, we recommend using Citizen chips as much as possible to ensure product quality and performance meet high customer demands. For mid-to-low-end products, we will provide more cost-effective chip options to meet the needs of different customer levels.


I hope everyone starts today with a comprehensive and in-depth understanding of the full spectrum. The full spectrum is not just a technical concept but a practical tool. Mastering full spectrum knowledge will help you apply this knowledge flexibly in practice, improving product quality and customer satisfaction.

In learning and applying full spectrum knowledge, we need to constantly accumulate experience and knowledge. Turning this knowledge into practical application can help you communicate more confidently and professionally with customers. I suggest printing these knowledge points and related images as sales tools, especially when communicating with designers and customers, where full spectrum application knowledge will be very helpful.

Therefore, everyone must understand the problems we will encounter when applying the full spectrum. Each person needs to start learning from one point of knowledge and gradually connect these points into a line, eventually forming a complete knowledge surface. Learning knowledge is like designing, a process of point-line-surface. Whether doing hard decoration design or lighting design, it is a combination of point-line-surface. So, make sure to learn each knowledge point well, then drive the entire knowledge chain, ultimately making the whole knowledge system work for you. This is the key to success in actual work.

By accumulating knowledge and experience bit by bit, you will become more proficient in communicating with customers. Applying this knowledge to actual work will become your advantage. I hope everyone can better understand and apply these lighting knowledge in future work, creating a healthier and more comfortable living environment.

Feel free to leave comments and interact under the article. Your comments and likes motivate me to share knowledge. I will read and respond to your questions and discussions as much as possible. In the next issue, we will explore the knowledge of miniaturization of lighting fixtures, so stay tuned.


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