I don't have a lumen meter and have only published specs, but I suspect the specs for these bulbs are meant to be Chinese lumens. I had around 1200 lumens of JDM ASTAR Extremely Bright 144-EX for the backup lights prior to this pair and noticed that one of them was dimmer compared to its companion after four years and when I replaced the entire taillight assembly. I decided to try another brand and get brighter bulbs. Unfortunately, with 1500 so-called lumens, they are no brighter and darker than JDMs with lower output power. Welcome to Chinese trash, totally random. I'm sending them back and will probably get another set of JDMs that will at least be bright until they're gone.
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