I bought these to replace the halogen bulbs in the headlights on my zero turn lawn mower. They are brighter than halogen lamps and ensure a much more even light distribution. I've now run them between 50 and 100 hours in various conditions (very hot, cold (close to frost), rain, dry weather, etc.) and haven't had any problems. Headlights don't seem to get any hotter than with halogens (and maybe a little cooler), and mower vibration has no effect. They also sit snugly in the lamp sockets when the lamp unit pops out. Also, my lawn mower doesn't have a lot of power for accessories, so the lower current draw was helpful. I highly recommend these lamps for this application. Update 5 July 2019 Well one of the two bulbs has blown after about 20 hours of use since I wrote the original review. I ordered a replacement set and now have a spare. Let's see how long the still working original and the new replacement last.
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