Nits vs Lumens vs Luminance: Key Differences Explained
While looking at some of the many light-emitting devices, such as televisions, LCDs, or light bulbs, you've probably noticed they're not all the same. Some are dim, while others are very bright, and often times you can even adjust the brightness or luminance settings. Display manufacturers use different units and specifications such as nits, lumens, luminance, brightness, or light output to describe their product's light-emitting properties, so it's essential to understand what they're talking about before making a purchasing decision.
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Why Understanding Light Measurements Matters in Display Design
Brightness isn’t a one-size-fits-all metric. What looks clear in a dim environment may fade or wash out under direct sunlight. That’s why display performance depends on understanding how light is measured, and how those measurements apply to real-world conditions.
Terms like nits, lumens, and luminance are often used interchangeably, but each serves a different purpose. Knowing the difference between nits vs lumens provides a more accurate path to selecting the right display from the start.
조명 컨셉
조도 측정 단위를 비교하기 전에 몇 가지 개념을 이해하는 것이 중요합니다:
- 조도: 조도: 표면에 닿는 빛의 양입니다. (표면이 얼마나 밝게 비춰지는지)
- 휘도: 휘도: 물체에서 방출되는 빛의 감지된 양입니다. 휘도는 밝기라고도 합니다.
- 루멘: 광원에서 방출되는 가시광선의 총량입니다. 광속을 측정하는 단위입니다.
- 광속(럭스): 모든 방향에서 방출되는 빛의 양으로 루멘 단위로 측정됩니다.
- 광도: 단위 솔리드 각도당 광원에서 특정 방향으로 방출되는 가시광선의 양입니다. 칸델라는 광도를 나타내는 SI 단위입니다.
- 칸델라: 빛의 세기를 측정하는 단위입니다. 칸델라는 단일 방향의 어느 한 지점에서부터의 휘도 강도를 측정합니다.
촛불 한 개에서 나오는 빛은 대략 1칸델라입니다. 대부분의 빛이 한 방향으로 집중되기 때문에 스포트라이트나 레이저에서 가장 높은 칸델라 등급을 볼 수 있습니다.
자세히 알아보기: LCD의 종류
조도 측정 단위
사람의 눈으로 볼 수 있는 밝기를 기준으로 빛을 측정할 수 있습니다. 빛을 측정하는 데 가장 일반적으로 사용되는 단위는 루멘, 럭스, 칸델라입니다.
라이트 국제 단위계(SI)
| 이름 | 기호 | 단위 | 단위 기호 |
|---|---|---|---|
| 광도 | lv | 칸델라 | cd |
| 휘도 | Lv | 평방 미터당 칸델라 | cd/m² |
| 광속 | Φv | 루멘 | lm |
| 조도 | Ev | lux | lx |
At Newhaven Display, we use luminance in candelas per square meter or nits to specify the brightness capability of our display products.
Nits
What are Nits? Nits (or NITS) are a measure of luminance, meaning it measures how much light an object emits. The term nit comes from the Latin word nitere, which means "to shine". The nit doesn't officially belong to the International System of Units (SI) or any other measurement system.
1 NIT는 평방미터당 1 칸델라에 해당합니다. 같은 유형의 수량을 나타낼 뿐만 아니라 동등한 단위이기도 합니다.
1 nit = 1 candela per square meter.
In simpler terms, nit is just a different name for candela.
Average consumer LCD displays have a luminance of 200 to 350 nits. For LCD displays used outside, 400-700 nits are minimum for use in daylight conditions, and at least 1000 nits to view in bright, direct sunlight. We sell Sunlight Readable displays and IPS displays designed with high-brightness LED backlights for outdoor applications.
How Nits Affect Real-World Display Performance
Nits measure luminance, or the brightness emitted from a display’s surface in a specific direction. This directly impacts how well the screen can be seen in different lighting conditions. A display may appear bright indoors but lose visibility in environments with strong ambient light if the nit level is too low.
For most indoor applications, 250 to 400 nits is usually sufficient. In outdoor or high-glare settings, displays typically require 700 nits or more to maintain legibility. Industrial controls, medical equipment, and automotive interfaces often fall into this higher range.
Newhaven Display offers high-brightness options specifically engineered for these use cases. Our Sunlight Readable TFT and IPS displays are built for visibility in direct light, while providing superior color accuracy and image quality.
루멘
루멘(lm)은 국제 단위계(SI)에서 광속을 측정하는 단위입니다. 광속은 루멘 단위로 측정된 광원에서 방출되는 빛의 양을 측정한 것입니다. 루멘은 일반적으로 전구 제품 사양에서 빛의 밝기를 설명하는 데 사용됩니다. 프로젝터의 광 출력도 일반적으로 루멘 단위로 측정됩니다.
루멘 대 칸델라
루멘은 모든 방향의 총 광량을 나타내며 칸델라는 단일 방향의 특정 지점에서의 광량 또는 강도를 나타냅니다.
니트 대 루멘
Although both the Nit and the Lumen are units used to measure light output, the key distinction between the two is that the Nit measures luminance or brightness of an object, and lumens measure how much light is being emitted.
1 니트는 3.426루멘과 같습니다.
칸델라 대 니트
1 칸델라는 1 니트와 같습니다. 이름 외에는 칸델라와 니트 사이에 차이가 없습니다.
휘도
휘도(Lv)는 물체에서 방출, 반사 또는 통과하는 빛의 양을 측정합니다. 휘도는 평방미터당 칸델라(cd/m²) 단위로 측정됩니다.
Although there are various units of measurement for luminance, including the Nit (nt) and the foot-lambert (fl), the International System of Units (SI) specifies the candela/square meter (cd/m²) as the measuring unit for luminance.
디스플레이 산업에서 휘도는 디스플레이의 밝기를 지정하는 데 사용됩니다.
Related: Image Burn-in
Misconceptions About Brightness and Display Quality
Brightness is often used as a shorthand for display quality, but that can lead to incorrect assumptions. Here are some common misconceptions:
- Higher brightness always means better visibility: Not always. A display rated at 1000 nits might look washed out if contrast is poor or if glare isn't managed. In some cases, a lower-brightness display with optical enhancements will perform better.
- Boosting nits solves all outdoor readability issues: Brightness is just one piece. Optical bonding, anti-reflective coatings, and panel type (like IPS vs standard TFT) all affect how readable a display is in bright conditions.
- Lumens and nits can be compared directly: Lumens measure total light output from a source. Nits measure how bright a display surface appears to the viewer. These are separate measurements used in different contexts. In displays, nits vs lumens is not an apples-to-apples comparison.
- All high-brightness displays behave the same in the field: Two displays with the same nit rating can still look very different. Factors like color accuracy, viewing angle, and ambient light handling influence real-world performance.
Choosing the Right Brightness for Your Application
Lighting conditions play a major role in display performance. Brightness levels that perform well indoors may not be visible in high-glare outdoor conditions.
- Indoor use: In environments like test stations, lab instruments, or control rooms, 250 to 400 nits is usually sufficient. The goal here is comfort and clarity without unnecessary intensity.
- Mixed lighting or partial sun: For equipment exposed to overhead lights, windows, or indirect sunlight, displays in the 400 to 700 nit range offer improved readability without excessive power draw.
- Direct sunlight or harsh glare: Displays used outside or in high-glare areas need to be at least 700 nits to remain legible. This is common in automotive, marine, and industrial field equipment.
The best starting point is to define the lighting conditions your product will face. From there, select a display that delivers consistent clarity at the lowest required brightness. Newhaven Display provides high-brightness display solutions designed for reliability, clarity, and exacting environmental needs. For projects requiring tailored performance, custom configurations are available to meet specific brightness, interface, or size requirements.
자주 묻는 질문
휘도는 어떤 단위로 측정되나요?
평방미터당 칸델라(cd/m²).
광속과 광도의 차이점은 무엇인가요?
광속은 광원이 전체 각도 스펙트럼에 걸쳐 방출하는 총 빛의 양을 측정합니다. 이와 대조적으로 광도는 광원이 특정 방향으로 방출하는 빛을 측정합니다.
휘도와 조도의 차이점은 무엇인가요?
휘도는 광원에서 방출되는 빛의 양이며 조도는 표면에 닿는 빛의 양입니다.
밝기는 휘도와 같은 의미인가요?
밝기는 휘도와 동일하지 않으며 정량적인 측정값이 없습니다. 밝기는 지각이며 일반적으로 백분율로 표시됩니다.
니트를 루멘으로 변환하는 방법은 무엇인가요?
1 니트 = 3.426 루멘. 니트를 루멘으로 변환하려면 니트 수에 3.426을 곱하기만 하면 됩니다.
루멘을 니트로 변환하는 방법은 무엇인가요?
루멘 수를 3.426으로 나눕니다.
결론
Understanding the nits, lumens, and luminance specifications is an important factor when choosing light-emitting devices such as LCD screens. However, there are other specifications to consider, such as refresh rate, interface, viewing angle, and resolution. Reach out to one of our engineers today to help you choose the perfect display for your application.
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