Review on 2-Pack HOTSYSTEM 21W 9004 HB1 LED Low Beam Fog Lights - Super Bright White Samsung LED Bulbs DC12V by Bryan Sperling

The good:Direct fit replacement for a 9004 bulb. No external power supply for a fan system. Did not take a second longer to install than a standard bulb replacement.The Bad:Not bright at all. I estimate they are about as bright as standard halogen bulbs at best.The Ugly:They splash light all over the place. I am illuminating the birds in the trees, not the road. I seriously think these lamps make driving more dangerous.These should not be marketed as headlight replacements.If you have a golf cart, or a four wheeler, this might be a good product for you, but not as a replacement for a standard car headlight.I am going out to purchase standard Sylvania bulbs on the ride home tonight, as I think these actually make driving in the dark more dangerous.UPDATE:Replaced these last night with conventional halogen bulbs. It may not be the fault of these bulbs, but as I removed the headlamp connector, the contacts on the bulbs ripped out. Maybe my headlamp connector was not aligned properly or the gripped the bulb contacts too tightly, or something, but these bulbs are not useless.There is a lot of potential for these bulbs, but I would not recommend them for automotive use on a public road.