Jonathan Smeeton is a British lighting designer who has also worked under the name of Liquid Len.
Smeeton was the creator of "Liquid Len and the Lensmen" (a reference to the Lensmen space opera books) who provided lightshows for the band Hawkwind in the 1970s.
He has also worked for groups such as The Rolling Stones, Jane's Addiction, Marilyn Manson, and WHAM!.
He was name-checked in the classic Genesis tune "The Battle of Epping Forest" from Selling England by the Pound:
"And his friend, Liquid Len by name,
Of wine, women and Wandsworth fame''...
In 2009 Smeeton is currently production designer to Taylor Swift.