I wasn't paying enough attention when I bought "4 inch" lights. They are, in fact 4 inch, but that is the entire housing diameter. The lens part is maybe 3 inch within the bezel. When I first opened the box, I thought the small lights weren't going to BLAST like they do, but I installed them anyway, and was completely surprised! The smallish size doesn't look that bad on the truck either despite being about the size of grapefruits. As for the beam pattern, it's a not-too-narrow spot that blazes away to about a 1/2 mile, and have decent side throw. I used this bracket: https://www.amazon.com/gp/product/B073V2NDQY?th=1 and this RF remote switch: https://www.amazon.com/gp/product/B00VYV451O The RF remote saves from installing a switch on the dash, drilling the firewall, etc. I had the RAM 1500 "learn" the remote for on and off, so these lights and my garage door opener right in the truck's upper console. The remote switch is an "arming switch" by feeding high beam output to a Bosch relay, which clicks on with high beams all the time. The RF remote then supplies power to that relay, and when on, powers the relay's contacts. That syncs the aux lights with high beams for convenience. The photo with the yellowish light is OEM high beams only.
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