I bought these candles to light Halloween decorations. When the candles arrived I immediately put them in the jewelry and set the timer for 4 hours. The lights were very bright and the lights were turned on and off at the same time each day. After about 10 days (40 hours) the light started to dim and then it got a little weaker every day until the batteries were empty on day 17 (68 hours). This is well below the 400 hour average given in the listing. Now I have to buy new batteries after less than 68 hours of use. I will buy good quality replacement batteries and hope they last much longer.
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