Some people may have such doubts. In the project, so-called IP67 buried lights are used. Many of them are well-known brands, but they still find leaks.
So, why the IP67 buried light still leaks water?
The reasons for the leaking of buried lights are summed up in the following “ 4 deadly sins”:
1. bad design
For example, some of the lamps are filled with glue. When the lamps are shipped from the factory, the waterproof level is really no problem, and there will be no water leakage.
However, in an outdoor environment, it will start to age and turn yellow after about half a year, and the lamps will enter the water.
Therefore, the waterproof of the filling glue is not reliable, and the waterproof structure is the best choice.
Some of the lamp covers are not pressed, and the manufacturer does not press a few more points. It is important to know that buried lights are often in an environment that is eroded by water, and it is easy to leak water if the cover is not pressed properly.
There are only 3 screws in such a large luminaire. The distance between the screws is very far. Do you think it is pressed tightly? Such a lamp cover is not pressed, and it will definitely be tilted up.
So filled with glue, do you think it will be waterproof?
The lighting of this international brand in the picture below does not have glue. Let’s see how many screws are used?
4 on the left, 4 on the right, 2 on the top
there are ten screws in total!
Frankly speaking, the several lamps mentioned above are difficult to pass the IP67 test. And even if you pass the IP67 level test, it doesn’t mean you won’t leak! Defects in the structure of the luminaire can also cause water leakage.
General test: Under certain temperature conditions, the luminaire is placed in the water for a period of time without leakage, and it is considered to have passed the IP67 test certification.
However, in the actual work environment of the lamps is complicated. When the sun is hot, it will become hot. When it rains, it will become cold. It will expand and contract. When the air inside the lamp is turned on, it will expand. When the lamp is turned off, the air will be compressed. Therefore, the effect of such a cycle is called the breathing effect. The pressure ring of the luminaire will be subject to the change of air pressure caused by the breathing effect, which will cause the buried lamp to leak water.
2 Material defect
Defects in the luminaire material may cause the lamp to leak.
This is related to the key materials for waterproofing lamps. Waterproof nuts, sealants, silicon rings, etc., often perform well when just installed, but the durability is not enough.
The poorer silicone ring aging in two months. When it is often sun-dried, it will cracking and leaking. This is premature failure and does not reach the design life.
Even if the silicone ring is not aged, if the silicone strip is not selected, it is not an inorganic material, but the organic material is likely to be affected by the mold, and then it will leak.
So the choice of materials is also very important~
3 Process defect
For example, when assembling, the lamp should be mounted to the entire pressing ring of the lamp to be the seal. Each screw has its own fixed torque. If it is pressed too tight, it will crush the silicone ring, and the too loose silicone ring will not be tight enough, so there will be a fixed torque.
The quality assured company all is set the right torque，and assemble with wind batch and electric batch.
This is electric batch
Non-designed and unconditional companies just screwed when assembling, so it’s strange not to leak!
Then, if it is a well-known international brand, the lighting design is reasonable, and the appropriate materials are used. Will such buried lights not leak?
Answer：of course not.Will this situation leaking? why?
There is only one possibility: installation reason
4 Reasonable installation
a. installation is not stable
The general possibility is that the installation is not stable. One side is high and low, plus the pressure of peoples or cars. Therefore, the position of the pressed silicone ring will lose its elasticity due to excessive pressure – and then it will leak.
Buried lights can’t be soaked for a long time. When installing buried lights, they often draw such an Installation drawings
▲ There should be a large space under the luminaire.
There should be gravel and sand under the empty, and there should be a drain at the bottom. This will drain the water and will not allow the lamp to soak in the water for a long time.
If the buried lamp is soaked in water for a long time, the environment is worse than in the pool. Because the ground is often cleaned with a cleaning agent such as oxalic acid, oxalic acid is corrosive and can invade the lamp to erode the lamp, then it will leak.
Then if the installation is stable, there are drainage measures, is this all right, will not leak?
Unfortunately, even if you reach this level, there is still a chance leak！
b power wiring
Another possibility for water leakage is the power wiring.
Ordinary tape connection is not waterproof, because the water vapor will enter the interior of the lamp along the gap of the tape wrapped around the wire, forming water mist inside the lamp.
So the reasonable way should be to use a waterproof junction box. The junction box is filled with glue, and the plastic junction box sinks the thread under the ground and the sleeve is set so that any water vapor will not go in. ▲ Filled with glue junction box
There are also a lot of buried lights that will make male and female plug, thought it was waterproof when tightened it.
In fact, it is not waterproof!
▲ waterproof male and female plug
In fact, due to the tolerances and the quality of the male and female plug, other human factors will lead to leakage from the gap.
Therefore, the best method is to put a tape on the outside of the male and female plugs, and put on silicone glue, which is double security.
Old-fashioned lamps need to be tightened during construction. The order of tightening is very particular. It should be tightened one by one in the direction of the screws. Tighten a little bit first – then gradually tighten until all is tight, so that it will be pressed tightly.
However, the integrated luminaires do not need to be screwed now.
When installing such a luminaire, you only need to pay attention to the wiring connection problem. The waterproof work will be handled by the factory.
The water leakage problem of the buried lamp is either due to the unqualified quality of the lamp itself, or the water leakage due to the installation.
Knowing the reasons for the leakage of buried lights, how to deal with the leakage of buried lights you should be able to get it!