As an indispensable object of modern home lighting, lamps and lanterns can create different atmospheres with different light sources. What are the key elements in the purchase of lamps and lanterns? What are the types of lighting sources? Different lighting sources have their own advantages and disadvantages, and they are also suitable for use in different space occasions. Next, I will break down the classification and characteristics of household lamps and lanterns, and give you the most practical light source selection skills to protect your eyesight and create a comfortable home environment. . Key parameters of the light source of the light source
1, luminous flux
The sum of the amount of light emitted by the light source per unit time, generally the greater the power , the higher the luminous efficiency, the higher the luminous flux.
2, color temperature
The temperature of a black body is called when the color of the light emitted by the light source is the same as the color radiated by the black body at a certain temperature is the color temperature of the light source.
3, Color rendering
The degree to which the true color of the object is rendered by the light source Average lifetime, a batch of light sources are lit at the same time , when 50% of the light sources fail, it is the average life of this batch of light sources.
4, light effect
Different light sources consume the same amount of electricity at the same time, and how much light is emitted. A light source with high luminous efficiency will definitely save more power than a light source with low luminous efficiency.
5, strobe
The number of times the light source flickers per second, the higher the strobe, the adverse effect on vision bigger.
Classification of Lighting Sources Incandescent Lamps
The biggest disadvantage of incandescent lamps is their short lifespan. The use time is generally between 3000 and 4000 hours, and some incandescent lamps with poor quality Can only be used for 1500 hours. Incandescent lamps in the home are often used in dining rooms, bedrooms and other spaces, and the color looks more comfortable.
Advantages: Small light source, with a wide variety of lampshade forms; great versatility, many color varieties, with directional, scattering, diffusion and other forms; can be used for To enhance the three-dimensional sense of objects, the color light of incandescent lamps is closest to the color of sunlight.
Disadvantages: Not environmentally friendly, when using incandescent lamps, 95% of the electricity is spent on heating, and only 5% of the electricity is really converted into visible light ; High heating temperature, fast thermal evaporation, short life (1000 hours), high infrared content, easy to be affected by vibration, low color temperature, yellowish.
Scope of application: Home dining room, bedroom
Tungsten halogen lamp
Metal halide lamp is actually a kind of incandescent lamp, and its life is generally between 3000 and 4000 hours. time, no more than 6000 hours. This kind of lamp can be used for accent lighting. For example, in order to highlight decorative paintings on the wall, indoor ornaments, etc., it can be illuminated with cold light cups. The white light of the lamp can be changed according to different home decoration styles, which is consistent with fashion.
Advantages: Simple, low cost, easy to adjust and control brightness, good color rendering.
Disadvantages: Short service life, low luminous efficiency, the filament is prone to fusing under long-term high temperature, and the failure rate is high.
Scope of application:Automobile headlights and rear lights, as well as home, office, office buildings, etc.
Fluorescent lamps
Advantages: Energy saving, fluorescent lamps About 60% of the electricity consumed can be converted into ultraviolet light, and the rest of the energy can be converted into thermal energy. Generally, the conversion efficiency of ultraviolet light to visible light is about 40%. So the efficiency of fluorescent lamps is about 60% x 40% = 24% – about twice that of tungsten lamps of the same power.
Disadvantages: It will produce light decay, and the color rendering of fluorescent lamps is not as good as that of incandescent lamps; the light has flickering phenomenon, which has a certain impact on vision; in addition, in the production process and use There is mercury pollution after disposal, causing environmental pollution.
Scope of application:Indoor public spaces such as factories, offices, schools, supermarkets, hospitals, warehouses, etc.
Energy Saving Lamps
Energy saving lamps are popular for their energy saving, a 9 watt energy saving lamp is equivalent to a 40 watt incandescent lamp. The lifespan of energy-saving lamps is also relatively long, generally 8,000 to 10,000 hours. After a period of normal use of energy-saving lamps, the lamps will dim, mainly due to the loss of phosphors, which is technically called light decay. Some high-quality energy-saving lamps have invented the constant brightness technology, which can keep the lamp in the best working condition for a long time. After 2000 hours of use, the light decay is less than 10%.
Advantages: High luminous efficiency, more than 5 times that of ordinary incandescent lamps, obvious energy-saving effect; long life, about 8 times that of ordinary bulbs; and small size, easy to use .
Disadvantages: It will produce light decay; the color rendering is low, the color rendering of incandescent and halogen lamps is 100, which is perfect; the color rendering of energy-saving lamps is mostly 80 to 90 In between, light sources with low color rendering not only look unattractive, but are also harmful to health and vision.
Scope of application:Traffic lighting, indoor lighting, landscape lighting
LED lights
This light is scientifically called light-emitting diodes and belongs to a new technology. The white LED lamps on the market now have better performance, but the current LED lamps still need to be improved in technology.
Advantages: LED lights have many advantages, such as small size, low power consumption, long life, non-toxic and environmental protection. They were originally used for outdoor decoration and engineering lighting. Home lighting.
Disadvantages: The price is high, and it needs constant current drive. The light efficiency is relatively low, and the color will be missing. Among the 7 bands, the blue and green bands of the LED light are relatively small, so there will be a lack of color when displaying the color of things.
Scope of application:Traffic lighting, indoor lighting, landscape lighting
