DENVER (CBS4) – This year’s Solar Decathlon was cut a little bit short due to lack of sunshine and a lot of snow.

The competition, which is open to the public, draws college students from around the U.S. and Europe to show off full-size homes they’ve built themselves.

(credit: CBS)

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The homes are judged on 10 criteria, including being solar powered and energy efficient.

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Organizers announced the competition would close on Monday. The homes will be back open for tours on Thursday through the final weekend.

Sen. Michael Bennet stopped by last Friday.

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A student answers questions posed by Sen. Michael Bennet. (Credit: CBS)

The first solar decathlon started in Washington D.C. in 2002.