Musically, Siberia has been described as being "grittier" and "darker" whilst also incorporating "poppier moments", and while the album still uses prominent elements of synth-pop, it also features influences of other genres such as dubstep and hip-hop and bitpop.

At the suggestion of her manager, Jian Ghomeshi, Lights decided to collaborate with the Toronto-based electronica band Holy Fuck, who she had met previously at the Reading and Leeds Festivals.

Matt Collar from AllMusic gave it a positive review, saying "The album is a blissful, laser-toned experience where Poxleitner's sweet voice is expertly wrapped in stylish, multicolored hues of fluorescent keyboard squelch and bass guitar shimmer.

"[18] Drew Beringer from AbsolutePunk also gave it a positive review, calling it "one of the better electro-pop albums of 2011, one that will stimulate your senses and rope you in with its instantaneous catchiness", but stated that Lights' vocal performance was "too safe".

"[14] Kosta Lucas from DIY Magazine wrote the album failed to shine by blending into what is already out there, adding that it is "a good snapshot of what is currently en vogue in modern music", though he praised the songs which showcased more of Lights' voice, stating that "she sings very prettily".