A light “The perfect partner” (5)

I believe the answer is:

match

I'm a little stuck... Click here to teach me more about this clue!

This might be a double definition.

'a light' is the first definition.
(I know that match is a type of light)

'perfect partner' is the second definition.
'match' can be an answer for 'partner' (thesaurus). I'm not certain of the 'perfect' bit.

'the' acts as a link.

Can you help me to learn more?

(Other definitions for match that I've seen before include "Partnership" , "Sporting event" , "Striker < in suit" , "Correspondence" , "one's struck" .)

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