The general voltage of the led line lamp is AC220V, DC12V and DC24V. Therefore, it is necessary to select the appropriate switching power supply, and the power supply is determined according to the power and connection length of the led light bar. It is important to note that the DC12V and DC24V can not be connected to AC220V, otherwise the beads will burn out. DC12V also cannot be connected to the control power of DC24V; Otherwise, the power will more than double, and it is easy to burn the beads. The AC220V light belt is directly connected to the city power. The RGB 7-color LED lamp belt needs to use the controller to realize the changing effect. It is generally used to distinguish the black, red, green and blue from the four lines. The light bars of the seven colors are generally in the common anode, which is the one on the lamp bar is +12V connecting the black line, the other is the negative pole, and the RGB access corresponds to the red and green blue interface or the power line.

In general, the series of led line lights, with the longest connection distance of 20 meters, the led light belt of 5050 series, the longest connection distance is 15 meters. If the connection distance is exceeded, the led line lamp is very easy to heat, which will affect the service life of the led line lamp in the process. The control distance of RGB simple controller is 10 to 15 meters. The control distance of the remote control controller is 15 to 20 meters, and the maximum distance can be controlled to 30 meters. If the connection distance of the led line lamp is longer, and the controller cannot control the long lamp strip, then the power amplifier needs to be used for tapping. Therefore, the installation must be installed according to the manufacturer's requirements.

(1) look at the label on the lamps and lanterns, general and normal line lamp manufacturer will label before delivery of lamps and lanterns indicated the specific parameters of the product, we can through the tag to see the line lamp voltage is used by many volts.

(2) how to do without labels? On lamps and lanterns is no label mark voltage is how much, if the lamps and lanterns is transparent glue, can clearly see the inside of the lamp body components, through its lamp bead amount, in the judgement of components such as resistors, capacitors, and then from low to high voltage test the lamps and lanterns of lighting conditions, can choose some testing tools during the test. If you can't see the internal components of the lamp, you need to disassemble the lamp for testing.

Generally led lines selected for lamp light bead, single voltage at around 1.8 3 v, general electric current can control in the 18th ma - 20 ma, for different number of mild color chip, each a different voltage led lamps and lanterns, eventually needed by the designed to engineer or technician to check.