Review on Dazzling Landscape Lighting: Sterl Lighting Dimmable 4 64Inch, Perfect for Ambience Control by Ryan Rodriguez

I opened four out of ten. Two of them had loose internal parts. There was no evidence of mishandling of the packaging, so I think the problem stems from normal bouncing that would be suspicious upon delivery. I tried one that looks intact in one of my lights and it didn't work, but honestly I suspect a faulty headlight.