Product updated on 2019-08-28, SBX Parts - SBX:LED:H4F3, H4 Series F3 LED headlight bulb kit, 10,000 Lumens per bulb, The latest LED Headlight product line is the F3 series which debuted in the spring of 2019. Using 45 watts per bulb and putting out an impressive 10,000 lumens per bulb makes these kits 30 percent brighter than HIDs. They feature an intelligent cooling system with a dual bearing fan for stable performance. Three year warranty., If you're looking for the brightest LED headlight bulb kits on the market then you need to check our F3 LED Headlight kits. They are rated at 10,000 lumens per bulb which means that some of our competitors will advertise them as 20,000 Lumens (because that is what the kit is rated at) when they finally start selling them in a year or two. Don't be fooled by their sketchy advertising which is aimed at tricking the consumer. LED headlight kits are rated per bulb as an industry standard. The only people that advertise them as a pair are people trying to fool you into thinking their kits are the brightest.