These worked very nice and are very bright compared to the stick halogen bulbs I had. I have not had the chance to try them in fog yet, but know by installing one and comparing how bright it was compared to halogen they will work great.If you are not aware when a vehicle is manufactured the fog lights and headlights are not set perfectly and always need to be adjusted.When I got my vehicle I already knew this and they were way off on both from day one. My fog lights they had shining up way to high and fog lights should be aimed lower than 24 inches. All you need to do with fog lights that are mounted under the bumper is measure up to the center mark on them and park on a level surface and back up perfectly straight 25 feet facing a wall. Then take a piece of tape and put it across a wall with your center mark measurement and aim them 4 inches below by turning the adjusters and you now have them aimed perfectly. Fog lights are only adjustable vertically unlike head lights that also have adjusters to aim them horizontally too.The reason you want fog lights shining under 24 inches is fog is always off the ground 24 and fog lights work by shining under it to illuminate the road in front of you. Where headlights are to high and do not go through fog and just create a glare right back at you with them being to high.So if your fog lights are shining to high they are pretty much useless shining into the fog doing nothing.Aiming headlights is pretty much the same thing getting your vertical center mark off the ground, but you also need to measure the center marks on both horizontally too. Then just like fog lights back up 25 feet perfectly straight on a level surface and put a piece of tape up, but subtract four inches off your vertical center mark you got and put it in the wall. Then turn the adjusters so you get the brightest amount of light on that piece of tape. Then with your horizontal center mark measurement that you got put a piece of tape vertically over that piece of tape on each side. This way when you turn the adjusters you can move them either way to get the brightest amount of light on each of those pieces of tape.Remember to back up perfectly straight so the fog lights and headlights when you adjust them are perfect. Fog lights do have a center piece in front of them installed inside them and some people do find a way to take that off to get a brighter light. They are there to have the light project side to side to illuminate better under the fog by the light reflecting back on the reflective part of the fog lights. They may look brighter when you look at them, but defeats the purpose removing them to shine under the fog better.Plus if you do all you are doing is blinding oncoming traffic and if an oncoming police officer sees that and gets blinded by them I am quite sure they will turn around and put the flashing lights on behind you and you will get a traffic citation.