There are some weakness of LED lighting waiting for improvement. One of them is that the lighting is a little bit too sharp for human eyes. Stare at the clean LED light source for seconds and eyes will not be very comfortable.
Not that friendly as incandescent lights. So many lamps are using a frosted glass to diverse these light, and try to give a better feeling. These lamps are getting better. One of these lamps are LED panel lights, which come from the idea of Grid light. Of course there are also LED grid lights in the market, which consist of 3pcs of tube lights in a grid base. Not bad, but from the frosted lamps idea, designers start to make a whole panel light, instead of some pcs of tube lights.
So how do we make a perfect such light? We use SMD led as the light source, which usually be SMD5050 and SMD3528 Led. SMD5050 and SMD3528 are also the main light source of LED strip lights.
Similar with LED strip light, LED panel lights use hundreds of SMD3528 or SMD5050 to finish one panel unit. There are two main kinds of LED panel lights in the market. One is power supply inside, the other is power supply outside the panel. The former one must be relatively more thick, some might be 8cm, with the SMD pcs on the bottom of the panel. The latter can be only 3CM, with the SMD on the side of the
panel. Which one's better? Not certain. The thick one can be better theoretically, but it also depends on the manufacturing and the materials.
To measure a LED panel light we focus on some aspects.
1, the PCB design.
2, light source.
3, the power factor.