At this year's 3.15 party, most of the lamps on the market were unqualified, and there were serious stroboscopic flashes. Long-term use would cause irreversible damage to consumers' vision health. At this point, a stone provoked a thousand waves, many parents began to worry about the child's vision health, looking for a table lamp to better use.
The vomiting of the sputum, the parents' awareness of this healthy lighting is still commendable. However, what most people don't know is that the black hand behind the strobe still stands with a lot of accomplices such as glare, illumination, color rendering, etc., and these black forces are not only present in the desk lamp, but also in the lamp and bulb of your home. , chandeliers, ceiling lamps, etc. The promotion of public lighting awareness is a matter of gratification, but we still have a long way to go.
Today, let's start by choosing a good light fixture. Here's how to choose an LED light bulb based on your feelings.
How should ordinary people choose a good light?
1, you look uncomfortable
If you feel good, it is often not accurate. But you can't feel it, one word: "Withdraw." Do not buy lamps that look uncomfortable first.
2, the hand reaches under the light bulb, I feel that my hand is not rosy and good-looking
Figure: Do you pay for this kind of light?
3. Look at the light bulb with your mobile phone. It flashes badly.
Although this method has been confirmed is not absolute, but if the light under the phone has a strobe, it is best not to buy.
Figure: There is a strobe under the phone, it is best not to buy.
4, listening to the buzzing
When the luminaire is working, it means that the internal parts are not coordinated or overloaded, so don't buy them.
5, the price is too cheap
If you feel that you have bought a cheaper one, you won't buy it, don't buy it! The word "good quality and low price" has become farther and farther away from us. If you don't understand and are afraid of being pitted, then you can buy brand lamps.
Photo: A lot of stalls are advertised as good and cheap flags, but the quality is worrying.
6, no parameter annotation
There are no parameters on the package: power (W), luminous efficiency (lm / w), color temperature (K), color rendering index CRI, generally belong to the ranks of three no products, do not buy!
Figure: Look at the parameters to see the parameters to see the parameters, the important thing is said three times.
7, low color rendering index
Color rendering index CRI <80, below this value, the object will be seriously distorted, don't buy! (PS: Color rendering index refers to the ability of the light to reduce the object. The higher the value, the better the reduction, the peak value is 100)
Figure: The visual realization of fruit under different color rendering indexes. When CRI=80, the fruit has lost its true color!
Here's a little trick. The default color rendering index for sunlight is 100. If the visual effect of an object under the sun is similar to that under the light, then the color rendering index of this light is definitely not bad.
8, color temperature is greater than 5000K
Of course, this is the color temperature standard of household lamps. Why do you buy this miserable color temperature at home?
Picture: Home space is a place to relax, no need to get a high color temperature fixture like the office, unless you want to refresh. It should be combined with low color temperature lamps to create a warm home atmosphere.
How to choose a good light for the owners
Of course, the innate shortcomings of ordinary people are professional, so the above methods are for reference only, and most families are too lazy to do their own work when choosing lamps, usually contracted by designers or decoration companies. At this time, the identification ability of designers and decoration companies is particularly important.
1 touch
Why is it necessary to touch the luminaire when it is used? Because some features of the luminaire are the same as other products, if it is fine workmanship, feel comfortable, under normal circumstances, the quality of the product has a basic preference. Therefore, sometimes the approximate quality of the luminaire can be felt by touch.
2 dismantling
Through the splitting and interpretation of the lamps, we can understand the installation and maintenance of the lamps, and compare which ones are more conducive to the future management and maintenance of the space.
3 thinking
Consider the different characteristics of the luminaire and compare the functional requirements of the space.
1 use time and operating expenses
Choose the right luminaire based on the time and operating cost of the luminaire.
Because the electricity saved by LED is about 85% of incandescent lamps, there is a long demand for lighting time, such as shopping malls, hotels, offices and other spaces, it is best to use energy-saving lamps. For short-lighting time requirements, such as bedroom, kitchen and other spaces, according to the price and personal preference.
Below, we can understand from the "Lighting Basic Lecture Textbook" ((Social Lighting Association) statistics on the length of lighting usage and operating costs, you can understand why the selection of lights should also consider the use of time and operating costs.
2 life and maintenance
Consider the factors that make maintenance difficult and easy, and choose lamps and light sources with long life and short life.
For example, in a relatively short space, and easy to replace the light source and maintenance, it is necessary to consider the quality and cost performance of the lamp. If it is in a high space, and even some of the high-altitude work vehicles are installed and repaired, it is necessary to consider the life and quality of the lamps.
3 is dimmable
Determine if the space requires dimmable luminaires.
4 materials and lamps
Not studying the relationship between light and materials is not a good choice for lamps, because the same materials, different lighting effects are completely different.
For example: the same crack-fermented translucent glass (due to the transparent and reflective qualities of the glass), the light that appears in a single 1-watt LED linear lamp will appear partially bright. The light that shines through the fluorescent lamp (T5) gives a soft, even gradient.
5 space height and lighting
From the direction of illumination of the light source, the luminaire can be divided into a down-illuminated type and a top-illuminated type. In the interior, the upper illuminating light is generally softer, while the lower illuminating light appears bright and direct. Therefore, when choosing a luminaire, in addition to personal preference, you should also consider the height and space of the ceiling, so that it does not cause pressure on the space.
4 records
Record different information about the fixtures for easy comparison, contact and ordering.
Record the model number of the selected luminaire to facilitate product ordering; record the price of the selected luminaire product to ensure that the cost is within budget. (Confirm whether tax is included); record on-site test conditions and select suitable lamps.
5 analysis summary
Finally, comprehensive analysis of the price, performance, quality and other factors of the lamps, in the comparison to help the owners choose the best cost-effective lamps.
The choice of lamps is a university question. This article only introduces several easy-to-implify identification methods. In order to objectively select a good fixture, it still needs related detection methods and testing tools. After all, the eyes are far from accurate. With the improvement of people's awareness of health lighting, more and more people are beginning to realize the importance of lighting. This is also the greatest value of lighting people. On the road of science, we still have a long way to go.
Ten standards for a good light
What's interesting is that because of the lack of corresponding professional knowledge and tools, when people choose the lights in the market, they always like to pat the same as picking watermelons. In fact, nothing is seen. . . . So the final winner must be the product of intuition.
According to national standards, the following nine articles can be used as the main reference for the general public to buy lights:
1, certification
Learning lamps must pass the national mandatory CCC certification.
2, light color
The warm white color of color temperature 3000~3300K meets the visual needs of children at this stage; the color temperature is too low to fatigue, the color temperature is too high, it will be excessively irritating, and there is a risk of injury.
3, glare
There is no glare in normal use.
4, illumination
The desktop illumination is preferably 700-1000 lx.
5, color development
Children's eyes are more sensitive, it is recommended that Ra>90.
6, power
The power should not be too small, the use time of the desk lamp is short, and energy saving is not the main consideration.
7, strobe
Low-frequency flicker can cause eye fatigue and psychological irritability.
8, blue light
The blue light hazard is also an indicator for the detection of the qualification of the desk lamp. The blue light hazard refers to the 400–500 nm blue light band of the light source. If the brightness is too high, the eye may cause photochemical damage to the retina after long-term direct view of the light source.
Of course, there is no need to talk about blue changes. When the blue component reaches a certain threshold, it will cause damage to vision.
9, scope
With a certain height, the illuminated surface of the light should be larger and more uniform.
10, structure
The bracket has a certain length and is easy to stretch and shrink. It is suitable for multi-purpose use such as computer, painting and playing the piano.
The choice of lamps is a university question. This article only introduces several easy-to-implify identification methods. In order to objectively select a good fixture, it still needs related detection methods and testing tools. After all, the eyes are far from accurate. With the improvement of people's awareness of health lighting, more and more people are beginning to realize the importance of lighting. This is also the greatest value of lighting people. On the road of science, we still have a long way to go.
Kadena (KDA) is a hybrid blockchain network and smart contract platform that aims to unite public applications, private blockchains, and other interoperable chains in one place, driving traffic to the high-bandwidth computer at the heart of the Kadena public chain. Kadena`s mining algorithm is Blake2S, which supports ASIC mining.
Kadena is a blockchain network and smart contract token aiming to bring together both public applications and private blockchain.
The coin solves various problems that prevent blockchain adoption on a bigger scale. The protocol enables businesses and developers to make transactions and share information across many networks.
The Coin is actually on the grid to reduce users` experience in the network. Ethereum users experience a lot of network congestion which results in high gas fees.
A few changes have come into Kadena mining. A proof of work blockchain uses PACT to create smart contracts in the hidden gen. Therefore you need to know the following before mining Kadena. PACT is an intelligent contract language serving the needs of the blockchain community.
1.You Need an Excellent Mining Hardware
To mine efficiently, you will require suitable mining hardware. Kadena uses ASIC miners. But, unfortunately for Kadena miners, CPUs and GPUs are not usable. Furthermore, ASIC mining receives support from the Blake2S algorithm.
2.Make Sure You Have a Kadena Wallet Address
You will need a Kadena wallet address to receive and monitor your profit. F2pool also makes the distribution of the revenues to every user daily at 2KDA. The Kadena node wallet is a perfect wallet where you can receive your mined KDA. all you need to do is install it, click receive, and have a new wallet address.
You will need to configure your Asic Miner to a mining pool server for your hashrate and profit to be recorded and monitored.
3.Start Mining
After all the setting is done, your miner will be ready to work. Make sure you enter your wallet address and click on the go button to receive your revenue.
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