About The Problems That Have To Be Paid Attention To in LED Underground Lights

LED underground lights are now widely used in parks, lawns, squares, courtyards, flower beds, and pedestrian street decoration. However, in the early practical application, various problems occurred in the LED underground lamp. One of the problems is waterproofing.

Research on waterproof problem of LED underground lamp

At first, it was thought that the LED underground light does not need to be waterproof at IP68 level, because it is not like the LED underwater light that has been in the underwater environment for a long time and is subject to water pressure. But in fact, LED underground lights need to solve the waterproof problem. In practical applications, LED underground lights are now on the ground or in the soil. In addition to dealing with rainy days or flooding, they also need to deal with thermal expansion and contraction.

There are several aspects to solve the waterproof problem of underground lamps. To solve the waterproof problem of LED underground lamps, we should start from the following aspects:

1. Shell: Die-casting aluminum shell is a common choice, and it is not wrong for die-casting aluminum shell to be waterproof. However, because of the different casting methods, the outer shell is different in quality and density (molecular density). When the shell is sparse to a certain extent, a short-term flushing will not cause water molecules to immerse. However, when the lamp housing is buried in the soil for a long time under the action of cold and hot suction, water will slowly seep into the lamp housing. Therefore, we recommend that the thickness of the shell be more than 2.5mm, and it should be die-casted with a die-casting machine with sufficient space.

2. Glass surface: tempered glass is the best choice, and the thickness should not be too thin. Avoid breaking into water due to the stress of thermal expansion and contraction and the impact of foreign objects.

3. Heat dissipation and ventilation: LED underground lamps have high heat and require good heat dissipation and ventilation to avoid too much temperature difference between the inside and outside of the lamp, water vapor, and sudden cooling and sudden heating leading to bad lights. The direct or indirect contact area between the lamp housing and the LED should exceed 80%, and air respirator, heat sink, etc. can also be added.

4. Embedded parts: the embedded parts should be as high as possible, and there will be enough water to soak into the lamp body.

5. Glue filling: the lamp body is filled with glue to die, and the lamp body is also filled with thermally conductive silica gel.

6. Desiccant can also be added.