Nilight 9006 HB4 LED Bulbs Conversion Kit Increase your confidence while driving at night. HB4 and 9006 are the same bulb just under different naming systems. No tools are needed to replace the LED bulb. Although the factory housing has a dust cover or there is limited space on the passenger side, only needs 10 minutes. 1:1 same size as halogen 9006 headlight bulbs, which perfectly fit into your 9006 housing. Provide a wider and farther visible range.