I use this on low from about 3:30am to 5am four days a week before charging. 45 minutes and it is fully charged. 3 hours and done. But in low light there is enough light to do its job in complete darkness. After 4 weeks it is still cool and shows no signs of fading. be defective and returned to the seller. These things will get the job done as you can get 2 for $20 so I can use both at high speeds and charge them daily.
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