I installed them in the headlights and taillights on my 2015 Tahoe. I'm a funeral director and needed flashes as I led the funeral procession. I installed them and they look and work great. They didn't come with instructions, but there are great videos on YouTube showing how to do DYI. They are bright and have 8 lights but I only used 4. It's great that you can turn off the lights you're not using, they have a lot of different settings to change the way the lights flash.
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