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Spectrally selective grow tube

  • US 8,307,580 B2
  • Filed: 04/26/2010
  • Issued: 11/13/2012
  • Est. Priority Date: 03/24/2008
  • Status: Expired due to Fees
First Claim
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1. A grow tube, comprising:

  • an interior member that is at least partially transparent to electromagnetic radiation in the visible portion of the electromagnetic spectrum and substantially opaque to electromagnetic radiation in the ultraviolet portion of the electromagnetic spectrum, said interior member having greater transmittance in both a red band pass and a blue band pass than in a green band pass, said interior member defining a central axis; and

    an exterior member substantially surrounding said interior member, said exterior member being at least partially transparent to electromagnetic radiation in the visible portion of the electromagnetic spectrum and substantially opaque to electromagnetic radiation in the ultraviolet portion of the electromagnetic spectrum.

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