There is more than one artist named Lunchbox:
i) An indiepop band based around Tim Brown and Donna McKean. Amongst a slew of 7" singles on various labels, they released their eponymous debut CD followed by two albums on Magic Marker Records, The Magic Of Sound and Evolver, and a mini-album Summer's Over on 555 Recordings.

ii) American rapper and record producer from New York, notably known for producing a handful of Shack Wes tracks, along with his solo rapping career.

iii) An experimental downtempo electronica band from Luzern, Switzerland comprising of Martin Baumgartner, Bruno Amstad, and DJ Olive. They have released one album, Anyways, for The Agriculture label.

iv) A pair from the US who created various kinds of electronic music from trance, dance, and ambient music. They can be further heard at their Myspace page.

v) A Swedish experimental techno/psytrance artist who has been doing his own style of music since 1998.
There's a punk band from Bonn with that name too.

vi) A progressive electro house dj from Montebello
www.myspace.com/microlunchbox
vii) A long defunct underground rock band from Łódź, Poland.

viii) lunCHbox: South Korean indie singer-songwriter. Also works under his legal name Choi Yong-chan (최용찬) as a record producer for RBW entertainment.

ix) LunchBox, a Cincinnati rock band with influences from funk, blues, jazz, and reggae, along with some heavier influence. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.