With the development of the smart home industry, intelligent lighting applications have been rapidly popularized. More and more lighting products have added various intelligent modules and are covered with "smart lamps".
Throughout the current smart lighting market, we can find a lot of lighting products, can open and close and adjust the brightness and color temperature through the mobile APP. These intelligent applications, without exception, can not be separated from the word "control", but the function that can be realized by operating on the luminaire, transplanted to the remote control of the mobile phone. Strictly speaking, this is a kind of “pseudo-intelligenceâ€. The truly intelligent lighting products should be able to get rid of the “control†factor and automatically give the user the most suitable illumination according to the preset conditions.
In May of this year, Philips Zhirui desk lamp was launched on Xiaomi Mall. This is an eye-protection table lamp jointly launched by Philips and Xiaomi. According to the official information: This is a clever light, using the mobile phone camera and light sensor to collect and process the light signal, calculate the ambient brightness, further optimize the light effect through the "light calibration algorithm", automatically help you adjust the appropriate brightness, Let you no longer worry about being too bright or too dark.
Figure: Zhirui product data map
In the same period, the Elamp eye-protection table lamp under the Aiwang brand was also officially launched in Jingdong. Elamp's built-in smart chip automatically detects the brightness of ambient light and adjusts the brightness of the stepless brightness to ensure that the illumination of the desktop is constant, effectively protecting the eyes from excessive darkness, excessive brightness or too much change and causing visual fatigue.
Figure: Elamp Product Data Sheet
From the functional description, both Zhirui and Elamp claim to automatically adjust the brightness to protect the user's eyes. Because there are no other desk lamps with automatic dimming function on Tmall and JD.com, we have made a comprehensive evaluation of Zhirui and Elamp today.
The assessment will be conducted in an objective and neutral manner, comparing the five aspects of design, operation, optical performance, intelligent application and additional application.
First, the design
1. Design.
Zhirui is currently the popular three-stage folding table lamp. The plastic material and the lines are hard and straight, and the color is the white commonly used by millet. The appearance of Elamp is a more individual arc shape, silver metal texture, and the surface is plated. After the expansion of Zhirui, it is similar in size to Elamp.
From the perspective of design, both have their own merits.
Figure: Comparison of the appearance of Zhirui and Elamp
2. Structural design.
Zhirui adopts a double-rotor design, which can rotate the shaft to adjust the illumination range, but the shaft is slightly tight, it is difficult to adjust its angle with one hand, and the lamp head cannot rotate left and right. The Elamp lamp holder is fixed and is a desk lamp that cannot be adjusted at all. It is necessary to move the entire lamp to adjust the lighting position.
From the structural point of view, Zhirui is slightly more humanized.
Figure: Zhirui structure diagram
Figure: Elamp structure diagram
3. Process details.
Zhirui's craftsmanship and details adhere to the high quality of Philips products, the degree of assembly of the components and the surface treatment, all of which characterize the world's first brand.
In contrast, Elamp has some room for improvement.
Figure: Zhirui detail map
Figure: Elamp detail
Second, the operation
1, operation.
Both Zhirui and Elamp are touch-based operations. There are touch buttons and indicators on the base of Zhirui. From left to right, they are power supply and 1-4 brightness. You can switch the light and adjust the brightness with a light touch, but there is no relevant icon mark around the indicator. Need to be familiar. There are only two touch buttons on the touch screen of the Elamp base, and the power button on the lower right corner is next to the switch button for the illuminance target value of different gear positions. Similarly, understanding the three sets of numbers on the Elamp touch screen can be a bit of a headache if you don't read the instructions.
In the design of the operation, Zhirui is slightly better than Elamp.
Figure: Zhirui and Elamp operation panel diagram
Third, optical performance
1, color temperature.
Through professional measuring instrument detection, Zhirui color temperature 4108K, color tolerance is greater than 7SCDM, while Elamp color temperature 3956K, color tolerance 3SCDM.
According to the Color Standard Requirements of Solid State Lighting Products of the National Institute of Standards, the color tolerance of LED products should be less than 7SCDM, and Zhirui failed to meet the requirements.
Figure: Comparison of the color temperature of Zhirui and Elamp
2, color rendering.
The same test results, Zhi Rui's display index Ra = 79, of which R9 = -3. The Elamp color rendering index is Ra=87, where R9=41. According to the "Technical Specifications for Visual Work Table Lamp Certification", the color rendering index of table lamps should not be lower than 80 and R9 should be greater than zero.
Both of the indicators of Zhirui failed to meet the requirements, and Elamp had better color rendering.
Figure: Comparison of the color rendering index of Zhirui and Elamp
3. Maximum illumination.
At full power operation, the maximum illumination value at the center point directly below the Zhirui lamp source is 872 lux, and the maximum illumination of Elamp is 861 lux. The difference between the two is small. (Note: the distance between the two light sources is 38cm from the desktop)
Figure: Zhirui and Elamp maximum illumination comparison chart
4. Uniformity of illumination.
Under normal use, the illuminance value at the center of the light source directly below and at the distance of 10cm, 20cm, and 30cm from the center point is shown in the figure below. Illumination on each axis, Zhirui's descending ratio is larger than Elamp, so Elamp has a better illumination uniformity.
Figure: Comparison of Illumination Uniformity between Zhirui and Elamp
Fourth, smart applications
The intelligent application of the two lamps is the main selling point of publicity and the main content of this comparison.
1. Use environment.
Zhirui is a desk lamp that can be connected to WIFI. Its smart application must be realized in WIFI environment. There is no limit to Elamp.
2. Preparation before use.
Elamp does not need to be connected to a mobile phone or WIFI, plug it in to automate operations. Using Zhirui requires an APP to be installed. Non-rice powder may feel that the steps of installing and connecting are cumbersome:
1. Install Xiaomi Smart Home APP;
2. Search and add Zhirui desk lamp;
3. Install the Zhirui desk lamp APP;
4. Open the APP and connect to Zhirui;
5. Enter the WIFI password to connect Zhirui to WIFI.
Figure: Zhirui connected WIFI diagram
3. The principle of metering.
Zhirui does not have a metering function. It needs to use the mobile phone APP software to measure with the mobile phone camera. The metering sensor on the Elamp base has the same metering technology as the professional illuminance meter, which is more accurate than Zhirui.
4, dimming mode.
Elamp provides 7 illuminance target values ​​for the user to select. After setting, Elamp continuously detects the change of ambient light, automatically adjusts its brightness automatically, and ensures the actual illuminance of the desktop is constant. This adjustment is dynamic, automatic, stepless, and the result of desktop mixed illumination is oriented.
The dimming of Zhirui in the APP is divided into four different scenes, and 0-100% stepless dimming. Dimming is manual, and the brightness of the luminaire is fixed after adjustment. When the ambient light changes, the brightness of Zhirui cannot change.
Figure: Zhirui dimming operation diagram
5. Intelligence level.
Elamp automatically adjusts its brightness to always give the user a constant illumination without human intervention. Zhirui also claims to be able to automatically adjust the appropriate brightness to avoid too bright and too dark. The calibration is automatic, but you need to manually place the phone directly under the desk lamp and click on the procedure to run the calibration. Moreover, the calibration is one-off. When the ambient light changes, it needs to be calibrated again.
We believe that Zhirui is not very smart. As for other smart applications, in addition to the timing eye protection reminder is more intimate, other applications are not practical.
Figure: Zhirui calibration function chart
Five, additional features
1, additional features.
The rear end of the Zhirui base provides a USB interface for charging the phone, while the Elamp has no additional features.
Figure: Zhirui additional function chart
The table below shows a more visual comparison between Zhirui and Elamp:
Figure: Comprehensive comparison of Zhirui and Elamp
In summary:
Both Zhirui and Elamp claim to be able to automatically adjust the brightness to adapt to changes in ambient light, providing users with more appropriate lighting to protect the user's eyes.
Zhirui and Elamp have their own appearance and structural design. In terms of process details, touch buttons and additional functions, Zhirui is slightly better than Elamp.
In terms of optical performance, in addition to the maximum illuminance values, the other optical properties of Elamp are superior to Zhirui.
In the most intelligent applications, Zhirui is not as "smart" as the promotional materials, it requires the use of mobile phones and manual startup procedures, and dimming is one-off. Elamp is fully automated and automatically adapts to ambient light for brightness adjustment. In smart applications, Elamp wins.
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