How to choose household lamps? Three important considerations you need to know

Lamps are indispensable in the home. In addition to the style of the lamp, the brightness and level of the light will be considered. There are many other important considerations. Let’s talk about the professional reference factors for lighting selection.

1) Color temperature

Color temperature (color temperature) is a measure of the light color of the light source. To put it bluntly , it is the color of the light. The unit is K ( Kelvin scale ). Before introducing the color temperature of the light, I prepared a picture for everyone.

as the picture shows:

The lower the color temperature value, the warmer the light color.

The higher the color temperature value, the cooler the light color.

Generally, the color temperatures of conventional LED lamps are:

3000K 4000K 5000K 6000K

Warm white light : about 3000K, warm white light is similar to incandescent light in color, with more red light components, giving people a warm, healthy and comfortable feeling, suitable for bedrooms or relatively cold places.

 

Neutral light : about 4000K, close to natural light, white light is yellowish, the color temperature of the lighting in large shopping malls and hotels is basically about 4000K, the light is soft, making people feel happy, comfortable and peaceful, and 4000-5000K in the living room is more comfortable.

 

Cool white light : about 6000K, which is positive white light or cool white light. The maximum color temperature of the European standard is 6000K, the light is all white, slightly blue, and the color is cool, with a bright feeling, which makes people concentrate. It is suitable for home kitchens or office places, classrooms, drawing rooms, reading rooms of libraries, exhibitions windows etc.

What should I pay attention to when choosing lamps?

1. Choose according to the style of your home

Different home styles create different atmospheres, and the color temperature should also echo the atmosphere created by the style, such as modern and simple styles, which mainly reflect the sense of fashion and modernity. The lighting should be mostly white light, which can better reflect the sense of fashion and modernity, while the pastoral , country style, etc., choosing neutral light or warm light can create a warm atmosphere corresponding to the style.

2. Choose according to different rooms

The performance of each room is different, and the requirements for the atmosphere of the space are also different. For example, the living room is a place where friends come to visit or family members watch TV and chat together. 1. The bedroom mainly creates a comfortable and warm atmosphere, and neutral light and warm light are mostly used.

The lighting color temperature of the dining room should be the same as that of the living room, because the guest dining room of the current building is transparent, and it is not recommended to use warm light in the bathroom and kitchen. Cooking in the kitchen will be hotter in summer, and if you use warm light, it will be even hotter. There is no need to create a warm atmosphere in the bathroom, so it is more appropriate to choose white light or neutral light for the kitchen and bathroom.

3. The color temperature of the light should be matched in layers

Taking the living room as an example, main lights, spotlights, table lamps, floor lamps, etc. can be used in the living room. For main lights and spotlights in pastoral and country styles, you can choose neutral light to avoid discomfort caused by the color temperature of the space lighting. The table lamps choose warm light to create a warm atmosphere.

When matching layers, it is not recommended to match warm light and positive white light. The contrast is too large, and the output effect is not easy to control. Generally, the main light and spotlight should choose neutral light or white light, while floor lamps, light strips, desk lamps, etc. Warm and neutral light to create a welcoming ambiance.

2) Light intensity

Light intensity is a physical term that refers to the luminous flux of visible light received per unit area, which can be simply understood as the light intensity per unit area. The general unit of measurement is lux or fc.

1. Lux: English is lux, abbreviated as x, which is the unit of illumination

The unit of lux illuminance is the number of lumens (lm) per square meter, and its unit is lux (lux or lx), that is: indeed 1lux=1lm/㎡.

2. fc is the abbreviation of English Foot candle, which is an imperial unit and is rarely used. 1fc means that the luminous flux of 1lm falls on the surface of 1 square foot.

3. The two are just the reference area of ​​the unit. The relationship between FC and LUX is 1Fc=10.764Lux

The following are the illuminance references for some scenes

School:

Illumination (lux)	place
1500~300	Drawing classroom, sewing classroom, computer classroom.
750~200	Classrooms, laboratories, internship factories, research rooms, book reading rooms, stacks, offices, staff lounges, conference rooms, health care rooms, dining rooms, kitchens, pantry rooms, broadcasting rooms, printing rooms, switchboard rooms, guard rooms, indoor sports fields .
300~150	Large classrooms, auditoriums, locker rooms, lounges, stairwells.
150~75	Corridors, elevator walkways, toilets, duty rooms, coworkers' rooms, flyovers, and outdoor playgrounds on campus.
75~30	Warehouses, garages, safety ladders.

factory:

Illumination (lux)	place
3000~1500	Ultra-precision operations, design, drawing, precision inspection.
1500~750	Design room, analysis, assembly line, painting.
750~300	Packaging, Metrology, Surface Treatment, Warehouse Office.
300~150	Staining, casting, electrical room.
150~75	Exit and exit, corridors, passages, stairs, powder room, toilet, warehouse attached to the workplace.
75~30	Fire escape, warehouse, outdoor power equipment (loading and unloading, inventory movement operations).

Hotels, restaurants, casinos:

Illumination (lux)	place
1500~750	counter.
750~300	Entrance, banquet hall, office, parking lot, kitchen.
300~150	Dining room, restroom, Japanese-style large room.
150~75	Rec room, hallway, staircase, guest room, bathroom, courtyard accent lighting, dressing room.
75~30	fire escape.

Shops, department stores:

Illumination (lux)	place
3000~750	Indoor display, window display, demonstration performance venue, checkout counter, packing station.
750~300	Elevator lobby, escalators.
300~150	Consultation room, dressing room, toilet, stairs, walkway.
150~75	General lighting in lounges and stores.

Home:

Illumination (lux)	place
2000~750	handicrafts, tailoring,
1000~500	Writing, homework.
750~300	Reading, makeup, kitchen table, cooking, telephone.
300~150	Washing sink, entertainment room, living room, reunion, entrance (inside) mirror.
150~70	Wardrobe, bedroom, toilet, stairs, corridor.
75~30	House number, mailbox, doorbell button, balcony.

3) Color rendering

Everyone must have noticed that the fruit stalls and butcher stalls in supermarkets and markets look brighter than the ones they buy at home. This is the difference in color rendering.

We use the color rendering index (Ra) to express the color rendering of the light source. Color Rendering Index (CRI) is a measure of the ability of a light source to accurately represent the color of the object it illuminates. Ra is another name for CRI, which is the color rendering index, which represents the realism of the light reflected from the object. The higher the index, the more realistic it is.

Human eyes have different sensitivities according to innate genes and acquired environments. Long-term exposure to high color rendering environments will increase the perception of space. Conversely, the ability to distinguish objects and accurately perceive the surrounding environment will be reduced.

If it is in a low color rendering environment for a long time,

1. The eyes are more prone to fatigue, which affects the progress of work and study;

2. The ability to distinguish colors is reduced, which may lead to color blindness in severe cases;

3. Reduce the quality of lighting, resulting in a dull and boring environment; when eating, the color of the food is distorted, affecting appetite.

The ideal color rendering index is 100

The International Commission on Illumination regards sunlight as the benchmark light, with a color rendering index of 100 ( also the highest value of the color rendering index ). Therefore, the closer the value is to 100, the closer it is to continuous spectrum natural light, and the higher the true color reproduction of the object. Therefore, when we buy light sources for our home, the color rendering index is recommended not to be lower than 80. When used in places of work, study and reading, the color rendering index is recommended to be 90 or above, which can play a certain role in eye protection and meet a relatively good lighting demand.