To expect this to last more than four months

[Ieattoomuchcake]

I bought a mothercare plug in night light. £9.99. It has a sensor which is supposed to make it switch on in the dark and off when it gets light. In reality it is never light enough in my bedroom for it to switch itself off so I switch it off each morning.
I have been using it pretty much every night for four months for up to twelve hours at a time. Tonight it's not going on and I think it's broken.
Typically I'm staying at my mums at the moment and don't have a spare so we've resorted to putting a normal lamp behind the bookcase(!!)

Anyway, I want to take the night light back to mothercare as faulty. My mother thinks that four months of being on every night is reasonable and I should just buy another.

Thoughts?
Thanks in advance.

Thats nearly 1500 hours (£1/150hrs). When you look at it like that I'd just buy a new one.

Take it back and complain that it's not lasted for a reasonable length of time (I have a sensor activated plug-in thing from Homebase and it's still going strong after 8 years!)... what have you got to lose?

Are you sure that the bulb has not just run out and you just need a new one?

I have those. Unscrew and replace lightbulb.

Aah it never occurred to me to replace the bulb. Can I blame baby brain five months after I gave birth??
Any idea where I'd get a replacement bulb (or know what type to buy?). I've looked on the mothercare website and can't see anything there

I had to take it to an electrical shop. I would bet any DIY store would have them as well.

don't take to mothercare, they don't care about stuff like that

take to hardware/elec shop and they will get it out and get you a replacement of the right sort