What is the use of gypsum ceiling light dual drive?

Now there are some merchants on the market selling dual-drive panel lights. In fact, these are just some bad businesses used to deceive people, the normal panel lamp is only a single drive, specifically I will tell you, the earliest panel lamp is the side light plate light (is the kind of thin,) this side light light is the side of the lamp body 2 light strips to light and then through the light guide plate to diffuse the light, so the brightness is relatively poor, and later with the emergence of the new straight light plate light (the thickness is thicker), the old side light has been difficult to sell, So some side-lit businesses thought of adding a drive into it (that is, the so-called dual drive on the market now) to publicize, saying that the dual drive is brighter and better to use, what is the fact, the fact is that it is useless, add a drive shunt, the drive life will be a little longer, and will not make the lamp brighter, and there is a fatal problem, that is, the drive is broken, the lamp will not work. The advantages of side light are that the lamp body is thin and not easy to be crushed during transportation, and the disadvantages are: >>>More

Ceiling keel.

There are generally two commonly used types, wooden keel and iron keel (light steel keel). >>>More

The partition wall can also be used as an isolation firewall with rock wool.

In fact, it is a junction box, which is generally used as a weak current compared to other junction boxes.

It can remove dirt left in the urinal. If you think it's good, take it, dear.