After 4 weeks of nocturnal use was the first of the 6 lights purchased the operation. The new I have now for about 5 wk. in operation and hope that it will last longer, because what good is a cheap device that you have to discard after a short time! There was big trouble then with the dealer who its guarantee obligation was unaware and referred me to the manufacturer plus gave me the wrong manufacturer. After another contact told me the seller, he could not provide a new night light, because he does not have in stock ?? !! Why can he sell new ?! Renewed Kontaktaufnahem with renewed refusal to help me. To leave after threatening to do the thing about Amazon, finally not a new night light but the remittance of the purchase price, however, without a word of apology! Conclusion: The nightlight I would not buy again and especially beware of this dealer !!