Details： model number:JHT149-1312-2 universal 8leds /3v1w length/width  800mm*12mm An LCD TV light bar is a series of light-emitting diodes (LEDs) located behind the LCD TV screen to backlight the screen. The working principle of the LCD TV light bar is based on the composition of LEDs, wherein the light emitted by the LEDs is modulated by the LCD screen to form visible pixels. LCD TV light bars usually consist of hundreds, even thousands, of LEDs arranged in a grid or bar array and connected to power and control circuits. Electrical energy enters the light strip through the wire, and the LED converts the electrical energy into light energy. The color of the LED depends on the composition of the material. The backlight structure of LCD TVs can generally be divided into two types: traditional CCFL lamp backlight and now common LED backlight. The CCFL backlight of LCD TV uses cold cathode fluorescent lamps to realize the backlight function, but it has been phased out because LED backlight can provide better picture quality and save energy. For the LED backlight mechanism, two types of side-light and direct-lit backlight are generally used. The side light uses LED strips placed on the edge of the LCD panel to let the light shine through, while the direct-type backlight uses LED tubes placed behind the LCD panel to form a backlight that evenly illuminates the entire LCD screen. In general, the working principle of the LCD TV light bar is: through the LED, the electrical energy is converted into light energy to provide the backlight of the light source, which is used to modulate the position and direction of the liquid crystal molecules, thereby creating an amazing picture effect. The installation method of the LCD light bar is as follows: 1. Determine the installation location: Before installing the LCD light bar, you should determine the installation location, and put all the prepared materials and tools in an appropriate location for easy use during the installation process. 2. Measure the size of the light bar: measure the size of the installation position in order to install the light bar correctly. Make sure the length of the light bar is suitable for the installation location. 3. Cut off the power cord at the junction box and connect the light bar: Use wire scissors to cut off the power cord near the junction box and connect the LCD light bar. Line up each connection position to ensure correct installation. 4. Install the light bar: put the LCD light bar on the installation position and fix it with screws. Make sure the light bar is secure. 5. Test the lighting effect: connect the power supply and test whether the lighting effect is normal. If there is a problem, you need to recheck the installation process until the problem is solved. 6. Final confirmation: After confirming that all the connections are firm, the installation position is correct, and the power cord is not loose, the installation of the LCD light bar is completed. Please note that before performing these steps, make sure you have fully understood the safe operation rules and disconnected the power to avoid electric shock injury. If you are new to electrical installations, seek professional help.