The 27-year-old grabbed 12 goals last season, helping Getafe to secure 11th place in La Liga.
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"His goalscoring record in La Liga has been very good. It was a department we thought we were a little short [in]."
The Venezualan has been capped 40 times for his country, and will provide competition for the likes of Georgios Samaras and Anthony Watt.
Given that Celtic's Champions League group contains Barcelona, Benfica and Spartak Moscow, Lennon will be hoping that Miku can have an immediate impact on Celtic's fortunes.
Lennon revealed that he is hoping to bolster his striking options further and that appears likely to be a free agent, given that he stated the deal "doess not necessarily have to be done tonight [Friday]".
Miku started his career at Spanish side Valencia before joining Getafe in 2010. The forward has also had loan spells with Alcoyano, Salamanca, Ciudad Murcia and Gimnastic in the past.