What is the essence of unlit lamp design?

This article does not talk about specific lighting arrangement methods, but briefly talk about my understanding of household lighting. I am not in the habit of teaching knowledge, and may not be good at it, but from years of experience, I have not made too big mistakes, so I think it is still just enough.

Directory:

What is brightness?

Does the higher the brightness, the brighter we feel?

What is the essence of a no-master lamp?

Advice for everyone

Now the arrangement of no master lamp can be said to be full of flowers, everyone wants to do no master lamp, but the true success of the case is little poor.

There are the following reasons:

No ceiling and want to do no main lamp

The type and power of lamps and lanterns are inaccurate

Lamp position determination sleeve template

Conceptual misperception

If it really comes down to one reason, it is [poor control of brightness].

The following content may seem boring, but if you can really understand, I believe you will surpass many lighting designers. Ps: Personal views are open to refutation.

We often hear interesting lights that have a hierarchy of light and dark, light where it should be bright and dark where it should be dark, but how bright should it be? How dark should it be? Where should I light up? Where should it be dark? So I call it “sloganizing,” and today I’m going to talk about it.

Q1: What brightness?

A1: I understand brightness as physical brightness and visual brightness.

[Physical brightness]

Refers to the light flux of visible light accepted on the unit area, the unit is called Candela, rough understanding is that 100W ceiling lamp installed in the living room, the brightness of the lamp itself.

[Visual brightness]

It refers to our subjective perception, the crude interpretation is whether I think it’s bright enough.

Another thing to understand here is something called luminance ratio, which is what we talk about as the contrast between light and dark.

The conventional wisdom is that as long as the lights are high enough, they are bright enough, but is that really the case?

What is the relationship between physical brightness, visual brightness, and chiaroscuro contrast?

This is the focus of this article, is also the core of home lighting lighting layout, if you understand this relationship, I believe you will stand at a new height to understand the lighting layout.

Q2:

Does the higher the physical brightness, the brighter we must feel?

A2: Of course not.

When the physical brightness is absolutely high, it feels particularly bright. For example, our father-in-law will feel very uncomfortable at any time to look into the sun’s eyes, and even burn his eyes. Because the sun is so bright, home lighting fixtures can’t possibly reach this brightness.

Back to the lamps and lanterns of home lighting, the following are two pictures taken by the same spotlight in the same environment, with the same mobile phone and with the same focus.

Darker surroundings – Source: Lighting fanatics

▲ The surrounding environment of the picture above is dark, the spot of light on the wall makes me feel very bright, and this brightness even makes me feel uncomfortable.

▲ When I turn on the other lamps on the ceiling, I look at this spot lamp, does it feel that it is not as bright as before, except that the ambient light has become brighter, the lamp has not changed at all.

Shoot the lamp did not change, but the visual brightness that we shoot the lamp became weak, this is light and dark contrast is in trouble.

If chiaroscuro can change the brightness of our vision, how did it come about?

Yeelight M2 to shoot the light

The main selling points of yeelight M2 are anti-glare and intelligent control.

Yeelight Smart LED down light Spot light Ceiling light Embedded hole light Night light Myap

jingdong

RMB 69.00

To buy

If the center brightness of the red circle is 500 and the ambient brightness is 50, then the contrast between the light and the shade is (central glare – ambient light)/background light.

So the above calculation gives the contrast of light and dark (500-50) /50= 9.

Once you understand this boring concept, the following questions get easier and easier.

The chiaroscuro contrast is divided into three scenes:

High brightness – low contrast

Low brightness – high contrast

Low brightness — Low contrast

To take the most common example, we all know that car high beams have N times the physical measurement of ordinary flashlights.

When we are driving in the daytime, even if the opposite car is driving in the far light, it has little effect on us. The reason is simple: the ambient light intensity in the daytime, the contrast between the headlights and the ambient light is very low, which is called high brightness — the visual brightness under low contrast is low, which means that we feel it is not bright.

On a dark night, even a simple flashlight can make us feel uncomfortable.

This is called low brightness — the visual brightness at high contrast is high, so it feels particularly bright to us.

Another example is that on a very dark night, we suddenly turn off all the lights, and suddenly we can’t see anything at all. But when we wake up at night, there is a weak light, so long as it is not so dark that we can go to the toilet without turning on the light and finish defecating smoothly, and we can also throw the paper towel into the trash can accurately.

This is called low brightness — we can see in low contrast even though the visual brightness is dim.

Highlighting and strong chiaroscuro contrast can easily make people feel tired, while too uniform lighting will make the space lack of interest. I have always insisted on maintaining a reasonable chiaroscuro contrast in household lighting.

Say a digression: perhaps because of this point of view, so I in the lamp industry is difficult to earn money, is destined to be difficult to be accepted, is not too peer look forward to, generally I do no main lamp cost is relatively low, the main reason is the lamp with less, is to save the province, not to sell more lamps for the purpose of the lamp merchant is not a good student.

Finally, a first-tier brand was selected to take charge of the whole process, saving about half of the cost. (Chat ends, text begins)

Why highlight and chiaroscuro contrast is too large, can let the eye feel tired easily? I went to study the data and came up with the following results:

When the pupil is stimulated by strong light, the pupil contracts. When the pupil is stimulated by weak light, the pupil slowly opens. When the pupil dilates, the surrounding muscles are relaxed, and the pupil contracts, the muscles are tense.

So even though you might feel comfortable in a high-light environment, you’ll still feel tired because your pupils are constricted and your muscles are tense.

This also explains why we can easily go to the toilet as long as it is not completely dark, because the pupil’s light surface is larger, so it receives more light.

Q3: So what kind of contrast is better for home lighting?

First look at the glare classification criteria:

Comparison table of glare value parameters

If the chiaroscy ratio exceeds 19, it is defined as glare critical, i.e. the chiaroscy ratio is 20:1.

This is easy to understand, we look up at the naked light bulb, will feel very harsh. The brightness ratio of the bulb to the ambient is more than 20 to 1.

At 10:1, or 9, we can see clearly what’s around us, and it’s a very sharp contrast.

5:1 is the contrast between light and dark is 4, which is what ordinary people think is more beautiful contrast (note: ordinary people), no matter the key point or the surrounding environment can be seen clearly.

3:1, or 2, is the threshold for discernible chiaroscuity, meaning below that it’s hard to tell what’s bright and what’s dark.

Knock on the blackboard: duang… duang…. duang…

In home lighting scenarios, the maximum contrast should not be more than 9, even if we are very fond of diamond-sharp lighting. Good visual brightness can be achieved even at low physical brightness.

A chiaroscuro ratio of around 4 is more ideal, which means you’ll still look bright even if it’s not too bright.

Low light and shade contrast suits children room, old person room more, slightly tall contrast suits the scene with strong atmosphere feeling.

So, moderate brightness + appropriate light and shade contrast, it is the more ideal illume means in illume that occupy the home.

Some of these ideas are really incomprehensible to me, even ridiculous.

For instance: intense light and shade contrast is advanced feeling, daybreak ground does not shine is advanced feeling, whole house shoots the lamp is advanced feeling, advocate do not have advocate lamp to want large area to shoot the lamp namely is advanced feeling.

This is what the ox X lamp dealer said I saw on the Internet:

But this is how it always works.

It seems to me to be against humanity. I do not know where such a sense of advanced from? Are my views too far behind The Times or are there other reasons?

Back to the subject of no main lamp.

The owner’s own understanding of lighting determines the quality of the light environment in your home. Only if you have a full concept of lighting and lighting, you will not follow what others say and are responsible for your own performance.

My advice to you is this:

1, all want you to use spotlights in the whole house will be shielded, do not ask the reason.

2, home lighting as far as possible to use small power spotlights, all want to let your living room installed 4 60W grille lights will be shielded, do not ask the reason.

3, no ceiling as far as possible do not play without a main light, install a ceiling light is stable and practical, the appropriate addition of a few small power spotlights, with appropriate light and shade contrast, can also create a high quality light environment.

4, to do no main light, please be sure to control the contrast and brightness.

5, reasonable, reasonable and reasonable use of spotlights, in the use of spotlights, be sure to cooperate with the basic soft light lighting.

Don’t be confused by the network map, the house is yours, the picture is someone else’s, look at the meitu is a moment of pleasure, the house is a living for many years, rational point, friends.

For more products please click: custom led tape light