"Leave a Light On" is a 2017 single by English singer-songwriter Tom Walker. The song was co-written by Tom Walker and Steve Mac and peaked at number 41 on the UK Singles Chart and number 62 on Irish Singles Chart, but was a greater hit on European charts particularly in Austria, Belgium, France, Germany, Italy and Switzerland.

This song is based on a friend of Tom’s Walker struggle with addiction. This can be represented within the music video, where his friend is stranded in the sea, alone. By Tom “leaving the light on,” he is giving his friend a way out of his struggles.

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