While Tagalog has many loanwords from English, "lighter" is one of them that is commonly used in its English form.
However, you might encounter other terms like:
* Posporo - this refers to matches, but can sometimes be used for lighters as well.
* Sindi - this is a general term for "to light" or "to ignite" something.
So, while "lighter" is the most common and direct translation, you might hear people use other words depending on the context.