latest advancement in solid-state LED Lighting Technology. feature Chip-On-Board (COB) design where hundreds of semiconductors make direct contact to the circuit board, essentially turning the entire circuit board in the luminaire. optimal thermal management, high packing density (no spaces), and overall high performance light output. very consistent light output and appears as one solid ring compared to than individual LEDs requires you to heat and open the headlight lamps in order to install this product. You can either use an oven or heat gun to open headlight lamp. requires a silicone adhesive type application, therefore there is no return or exchange once it is installed We highly recommend professional installation for this product One transformer box (The inverter box is also called