20KV 150LPW IP66 IK08 Outdoor LED Street Lights Aluminium Alloy

The lamp holder of the LED street light is made of die-cast aluminum, and the empty package weight is 8KG-9KG without light source.

Wind resistance rating of LED street lights: Level 12.

LED has the advantages of rich color, long life, low power consumption, small size, and high photoelectric conversion efficiency. Lamps using LED as the light source have the advantages of energy saving, low heat, bright color, easy control, and long life.

RE: Normally 3-5 business days for samples, 10-15 business days for bulk orders.

Q8: What should be paid attention to in the daily use of LED street lights?

RE:1.The power supply of LED street light must be constant current

The lighting material characteristics of LED street lights determine that they are affected by the environment. For example, as the temperature changes, the current of the LED will increase; in addition, the increase of the voltage will increase the current of the LED. If working beyond the rated current for a long time, it will greatly shorten the service life of the LED lamp beads. LED constant current is to ensure that the current value of its work remains unchanged when environmental factors such as temperature and voltage change.

2. Constant current accuracy of LED street lamp power supply

The constant current accuracy of some power supplies on the market is poor, and the error may reach ±8%, and the constant current error is too large. Ordinary request is sufficient within ±3%. According to the 3% design plan. Consumer power needs to stop fine-tuning to achieve ±3% error.

3. Working voltage of LED street lamp power supply

The recommended operating voltage of ordinary LEDs is 3.0-3.5V. After testing, most of them work at 3.2V, so the 3.2V calculation formula is more reasonable. The total voltage of N lamp beads in series=3.2*N

4. What is the most suitable working current of the LED street lamp power supply?

For example, the rated working current of the LED is 350 mA. Some factories use it up as soon as it starts. The design is 350 mA. In practice, the heating is very serious when working at this current. After repeated experiments, the design of 320 mA is ideal. Minimize the amount of heat generated, so that more electrical energy becomes visible light energy.

5. How wide is the series-parallel connection and wide voltage of the LED street lamp power supply board?

To make the LED street lamp power supply work in a wider range of input voltage range AC85-265V, the LED series and parallel connection of the light board is very important. Try not to use wide voltage, and divide the dividend AC220V and AC110V into categories as much as possible, so as to ensure the reliability of the power supply. Since the current power supply is generally a non-isolated step-down constant current power supply, when the requested voltage is 110V, the output voltage should not exceed 70V, and the number of series connections should not exceed 23 strings. When the input voltage is 220V, the output voltage can reach 156V. In other words, the number of series does not exceed 45 series. Do not connect too many in parallel, otherwise the working current will be too large and the power supply will generate serious heat. There is also a wide voltage plan, APFC active power compensation is to use L6561/7527 to raise the voltage to 400V first, and then step down, which is equivalent to two switching power supplies. This plan is only used under certain conditions.

6. Isolation/non-isolation

If the ordinary isolated power supply is made into 15W and placed in the LED street lamp power tube, the transformer is very large and difficult to put in. It mainly depends on the space structure and the detailed conditions. The isolation can only achieve 15W, and there are few that exceed 15W, and the price is very expensive. Therefore, isolation is not cost-effective. Generally, non-isolated products dominate the mainstream, and the volume can be made smaller, with a minimum height of 8 mm. In practice, non-isolated security measures are done, and there is no problem. Space permitting can also be used as isolated power supply.

7. How can the LED street lamp power supply match the lamp bead board?

In fact, choose the best series-parallel connection method. The voltage and current applied to each LED are the same, but the power supply can exert the best performance. The best way is to communicate with the power supply manufacturer first and tailor it. Or own power consumption.

8. LED street lamp power efficiency

Input power minus output power value. This parameter is particularly important. The larger the value, the lower the efficiency, which means that a large part of the input power is converted into heat and distributed; if it is installed in the lamp, it will produce a high Temperature, coupled with a light effect of our LED than the heat distributed, will superimpose to produce a higher temperature. And the life of all electronic parts in our power supply will be shortened with the rise of temperature. So efficiency is the decision power supply life The most basic factor, efficiency cannot be too low, otherwise the heat consumed on the power supply is too large. The efficiency of the non-isolated type is higher than that of the isolated type, usually above 80%, but the efficiency is related to the matching connection method of the light board

9. LED street light source heat dissipation

The main element of the heat dissipation plan is that LED street lamp beads can greatly prolong their life under overheating conditions. Generally, aluminum alloy is used for easier heat dissipation. That is, the LED street lamp power beads are attached to the aluminum substrate, and the external heat dissipation area is expanded as much as possible.

10. LED street lamp power supply heat dissipation

The main element of heat dissipation is that the LED street lamp power beads can greatly prolong their life under overheated conditions. Generally, aluminum alloy radiators are used to dissipate heat more easily. That is, the LED street lamp power beads are attached to the aluminum substrate, and the external heat dissipation area is expanded as much as possible.