Can someone please explain my back lights?

Hiya, i know this probly sounds really stupid, but i only passed my test last week & bought my car on monday so here goes..

Iv got a 53 plate K12 micra and was wondering if someone could please explain to me how many reverse lights its meant to have? when i put my car into reverse i only get 1 light on the left? is this right? also, when i put on rear fog lights there is only 1 light again but this time on the right. is this supposed to happen?
 
Ahh okay thankyou :) i js wasnt sure if there was supposed to be a reverse light on each side & the same with the fogs. glad my car is normal then (Y)
 
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