Currently, almost all LED lamp with built-in power supply are on the market. Refers to the so-called built-in power supply can be placed inside the tube. This built-biggest advantage is that you can make a direct replacement for existing fluorescent tubes, without having to make any changes to the original circuit. So the shape of built-in power strip is usually done growing, so go into the semi-circular lamps. There are two built-in power supply, a non-isolated, one is isolated.

    Non-isolated LED refers to the load side and 220V inputs have a direct connection, there is the danger of electric shock load and therefore touch. 220V isolation between the aluminum plate and aluminum only a very thin insulating layer, usually not easy to pass CE and UL certification.

   Isolated refers to the input and output terminal isolation transformer isolation transformer may be the frequency that may be high frequency. However, both the input and output isolated. Avoid the risk of electric shock. Also easy to pass CE or UL certification.