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don't kid yourself with the claim of that amount of lumen for that long. Not bashing the light, but I'm 99% confident the burn curve looks like this. Most all of the cheap backup lights do this. They're all basically the same but I hope to hell you didn't pay $140 for it. Much better lights out there for that kind of money or comparable lights for a lot less...
We Test Lights | AL1100NP Test and Review
Are you inferring that Big Blue lights are "cheap" and don't live up to their claimed specifications here?