Multi-stage optical waveguide for a luminaire

A luminaire comprising:

• an optical waveguide comprising:
• a plurality of waveguide stages, each of the plurality of waveguide stages comprising a coupling surface, a re-direction surface opposite to the coupling surface and an exterior surface extending between the coupling surface and the re-direction surface where the coupling surface receives light, the redirection surface emits a first portion of the light from the waveguide stage and redirects a second portion of the light to the exterior surface, the exterior surface emitting light from the waveguide stage;
• the plurality of waveguide stages arranged in a stack such that the re-direction surface of one of the waveguide stages is arranged opposite the coupling surface of an adjacent one of the plurality of waveguide stages;
• at least one LED for directing light into the coupling surface of a first one of the plurality of waveguide stages;
• and
• a housing surrounding the optical waveguide.