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Select the misunderstanding of the LED work light.

23 Published by admin Nov 12,2019

Misunderstanding 1, the expectation of the actual service life is too high.
LED work light manufacturers expect LED work light life to reach 100,000 hours MTBF
(Average time between failures, the standard used by traditional luminaire manufacturers to measure lamp life). However, like all basic light sources, the luminous flux of an LED work light is also attenuated over time. So although the LED work light illumination time can be very long, MTBF is not the only consideration for determining the service life.

Auxiliary Lights


CM-5021D|5.5″ LED Work Light

The attenuation of LED work light lumens is affected by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen attenuation is also affected by control, thermal management, current levels, and many other electrical design considerations (cited by CK Corporation, USA).
Many salesmen may give customers some ambiguous information for some reason when selling LEDs, which is misleading. For example, the service life of LED work light is about 100,000 hours, and 100,000 hours here refers to manufacturers' expectations.

CM-5021D LED work light


CM-5021D|5.5″ LED Work Light

LED work light life. As the light source of illumination, the brightness of the lamp has a process of gradually decreasing and darkening (such as fluorescent lamp, energy-saving lamp), which is referred to as light decay. On application-level LED work lights, when the light decay exceeds 50%, the human eye can clearly feel the change in brightness. At this time, the brightness of the product is not suitable for illumination. Many manufacturers and contractors use low-cost LEDs for three months to half a year. It is often found that the brightness of LED work lights is not as bright as when they were installed, or even close to nothing. It is precisely because LED work light light is not considered. In summary, when we buy LEDs, we should pay attention to its light decay speed, not the use time.

Portable led work light detail


CM-5021D|5.5″ LED Work Light

Misunderstanding 2, the actual luminous angle is taken as an effective angle.
The illumination angle of the LED work light is divided into an effective angle and an actual illumination angle. The angle at which the luminous intensity value is half of the axial strength value and the angle of the luminous axis (normal) are effective angles. The angle of view of twice the half value angle (or half power angle) is the actual illumination angle. Angles other than half of the axial strength are not considered effective angles in practical applications because the light is too weak. (The picture below shows the side view of the piranha particles. The angle between the solid line and the dotted line is not included in the effective angle.)
Therefore, we should pay attention to the actual lighting angle of the product when purchasing the product. When calculating the number of products used in the project, the actual lighting angle can be used as the reference value.


CM-5021D|5.5″ LED Work Light

Misunderstanding three, the higher the power, the higher the brightness.
The brightness of an LED work light is measured by the intensity of the illumination, which is the luminous intensity in the direction of the normal (for the axis of the cylindrical light-emitting tube), that is, the luminous flux emitted by the unit solid angle, in units of candle light (Candelacd). Since the luminous intensity of a general LED is small, the luminous intensity is usually measured in millicald (mcd). Generally speaking, the light source emits its luminous flux at different intensities in different directions, and the visible light radiation intensity emitted by the solid angle in a specific direction is called light intensity, which is simply referred to as axial brightness.
The concept of electric power is introduced from the amount of work done by force in equal time. The current is fast and the electric power is large; the current is slow, the electric power is small, or the electric work is more in the same time, the electric power is larger. On the LED, the higher the power, the higher the brightness of the product. Take Yimei Electronics' three-lamp red LED as an example. When the axial brightness is 1200mcd, the current is 40ma and the power is 0.48W. The three-lamp white LED has the same brightness, the current is 18ma, and the power is only 0.24W. It can be seen that The power of the two lights at the same brightness is different. So what we pay attention to when buying LEDs is its axial brightness, not power.


CM-5021D|5.5″ LED Work Light

Misunderstanding 4, about the purchase of white LED modules.
High-brightness (blue-green) white LEDs are sensitive to static electricity and are determined by the characteristics of the LED itself. Exceeding the maximum forward DC current and maximum reverse voltage it can allow may cause damage or breakdown of the LED. For example, a three-lamp LED module, each lamp will have an anti-static resistor, plus a resistor for current limiting, a total of four. The anti-static resistor can effectively suppress the damage caused by static electricity to the LED work light; the current limiting resistor mainly limits the amount of current passing through the entire module. Such a design can effectively improve the anti-overload capability of the LED work light and enhance product stability. At the same time, whether the four resistors are complete or not is also a sign that can easily identify whether the module quality is stable or not.

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Guangzhou Chiming Electronic CO., Ltd.
No.82 hantang West Road ,hantang Village,renhe Town,haiyun District, Guangzhou,China.
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FAQ
Q1 .Are you manufacturer or trade company?

Chiming:We are one of the earliest automotive LED lights manufacturers in China.

Q2.Can you produce according to the samples?

Chiming: Yes, we can produce by your samples or technical drawings. We can build the moulds according your need.

Q3.Do you test all your goods before delivery?

Chiming: Yes, we have 100% test before delivery

Q4. How do you make our business long-term and good relationship?

Chiming:We keep good quality and competitive price to ensure our customers benefit

Q1 .Are you manufacturer or trade company?

Chiming:We are one of the earliest automotive LED lights manufacturers in China.

Q2.Can you produce according to the samples?

Chiming: Yes, we can produce by your samples or technical drawings. We can build the moulds according your need.

Q3.Do you test all your goods before delivery?

Chiming: Yes, we have 100% test before delivery

Q4. How do you make our business long-term and good relationship?

Chiming:We keep good quality and competitive price to ensure our customers benefit

Q1 .Are you manufacturer or trade company?

Chiming:We are one of the earliest automotive LED lights manufacturers in China.

Q2.Can you produce according to the samples?

Chiming: Yes, we can produce by your samples or technical drawings. We can build the moulds according your need.

Q3.Do you test all your goods before delivery?

Chiming: Yes, we have 100% test before delivery

Q4. How do you make our business long-term and good relationship?

Chiming:We keep good quality and competitive price to ensure our customers benefit

Q1 .Are you manufacturer or trade company?

Chiming:We are one of the earliest automotive LED lights manufacturers in China.

Q2.Can you produce according to the samples?

Chiming: Yes, we can produce by your samples or technical drawings. We can build the moulds according your need.

Q3.Do you test all your goods before delivery?

Chiming: Yes, we have 100% test before delivery

Q4. How do you make our business long-term and good relationship?

Chiming:We keep good quality and competitive price to ensure our customers benefit

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