LumiBright on new Seiko a bitter disappointment

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New Seiko 5 came in today. Sat that bad boy in the window in the direct sun for hours this afternoon. Lume was bright for a bit…and completely dark in less than a couple of hours. Anyone else have this experience? Is Superluminova better? If so, I may have to sell this one.
 
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That’s about my experience with Super Luminova. Very bright initially but dies down pretty fast. Will still have some glow if it’s pitch black. Sounds normal to me.
 
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Seiko is generally better then Super Luminova, which to me is not that amazing.