Really a good tool for test LCD lamps! Support to 15 inch below CCFL lamps. Application Range: LCD backlight detection, LCD TV backlight detection, LCD maintenance display channel detection, CCFL advertising signs, motor angel eye headlights . When we repair LCD screen or notebook and see a little shadow from very dark screen or get inverter protection, it's very difficult to know if problem comes from the CCFL tube or inverter board. If we have this tool, easily find out the problem. Directly connect this tool to the monitor 12V power supply, and clip the both end of lamps, you can light the CCFL lamps., Manufacturer: Akfldms