Factors affecting the quality of LED lamps and lanterns

First, choose what kind of LED white light.

This is very important, the quality of LED white light can be said to be a very important factor. For example, the same 14mil white segment chip of crystal electricity is used as the representative, which is made of ordinary epoxy resin

After 1000 hours, the failure rate is 70% 6: if class D low failure is used

In the same aging environment, the aging time of 1000 hours is 45%: in the same aging environment, the aging time of 1000 hours is 12%:; in the same aging environment, the aging time of 1000 hours is 12%; in the same aging environment, the aging time of 1000 hours is 45%: if the aging time of class B is low

In the same aging environment, the aging time of 1000 hours is 3%:; in the same aging environment, the aging time of 1000 hours is 6% for class a low aging glue.

Its deception, LED lamp bead working environment temperature.

According to the aging data of a single LED white light, if only one LED white light is working, and its ambient temperature is 30 degrees, then a single LED

When the white lamp is working, the bracket temperature will not exceed 45 ℃. At this time, the lifetime of this led will be ideal.

If there are 100 LED white lights working at the same time and the interval between them is only 11.4mm, then the bracket temperature of the LED white lights around the light stack may also be

Not more than 45 degrees, but those led white lights in the middle of the stack are likely to reach a high temperature of 65 degrees. At this time, it is a test for LED lamp beads. So, the LEDs in the middle

White light. Theoretically, the light will decay a little faster. And the LED white light around the light stack will decay a little slower.

Anyway, we should know that led is heat resistant; the higher the temperature, the shorter the life of LED, the lower the temperature, and the longer the life of LED. The ideal working temperature of LED is from minus 5 to

Between zero degrees. But it's basically impossible.

Therefore, when we know the ideal working parameters of LED lamp beads, we should try our best to enhance the heat conduction and heat dissipation when designing lamps. Anyway, the lower the temperature, the longer the LED life

Life is longer.

Thirdly, the working electrical parameters of LED lamp beads are designed.

According to the experimental results, the lower the driving current is, the less heat is emitted, of course, the less brightness is. According to the survey; LED solar lighting circuit

Generally, the driving current of LED is only 5-10ma; the number of lamp beads used in lamps has a large number of products. If more than 500, or more, the driving current is generally only 10-

15 mA. And the driving current of general popular LED application lighting is only 15-18 ma. Few people design the current above 20 mA.

And the experimental results also show that under the driving current of 14 Ma, and with the cover of air tight, the air temperature inside can reach 71 degrees. Low decay products, 1000 hours

The light attenuation is zero. The light attenuation is 39% 6 in 2000 hours, which shows that this kind of low attenuation LED white light has reached its maximum limit in such an environment, and even greater is a kind of damage to it

Now.

Because the aging board has no heat dissipation function, the heat generated when the LED works is basically unable to transmit to the outside. This is proved experimentally. Ageing

The air temperature inside the board has reached 101 ℃, and the surface temperature of the cover on the aging board is only 53 ℃, dozens of degrees different. This shows that the plastic cover base is designed

It does not have heat conduction and heat dissipation function. But the function of heat conduction and heat dissipation is considered in the design of general lamps. Therefore, in summary, the design of working electrical parameters of LED lamp beads should be based on

In fact, if the heat conduction and heat dissipation function of the lamp is very good, it doesn't matter that the driving current of the LED white lamp is a little larger, because the heat generated by the operation of the LED lamp bead can be exported out in an instant

Face. No damage to LED, is the best care for LED. On the contrary, if the heat conduction and heat dissipation function of the lamp is careless, it is better to design the circuit small. Make it less

Heat comes out.