Thermal expansion and contraction of the lamp housing. The waterproof led light manufacturer tells you that the change of temperature causes the thermal expansion and contraction of the lamp, and the linear expansion coefficient of different materials (such as glass and aluminum profiles) is different, and the two materials will shift at the joint. The waterproof led light manufacturer tells you that the process of thermal expansion and contraction is repeated constantly, and the relative displacement is repeated constantly, which greatly damages the air tightness of the lamps.

Thermal expansion and contraction of the internal air: The waterproof led light manufacturer tells you that water droplets on the glass of buried lights can often be observed on the ground of the square, and how do the water droplets penetrate into the lamps filled with potting glue? This is the result of respiration during thermal expansion and contraction.
Waterproof led light manufacturers to tell you that when the temperature rises, under the action of huge negative pressure, the moist air penetrates into the interior of the lamp body through the tiny gaps in the material of the lamp body, and then encounters the lower temperature lamp shell and condenses into water droplets. and gather. After the temperature is lowered, under the action of positive pressure, the air is discharged from the lamp body, but the water droplets are still attached to the lamp body. The breathing process of temperature changes is repeated every day, and more and more water accumulates inside the lamps.
The manufacturer of waterproof led lights tells you that the physical changes of thermal expansion and contraction make the design of waterproof and airtightness of outdoor LED lamps a complex system engineering.
Through the above introduction and analysis of the influence of thermal expansion and contraction on waterproof led light, hope it helps you.