Edge lit luminaire

An edge-lit luminaire comprising:

• a housing having a central opening and a first surface disposed around the central opening;
• a first heat sink secured to the first surface;
• a second heat sink moveably coupled to the first surface;
• a lens positioned between the first heat sink and second heat sink and proximate the central opening;
• a biasing member coupled to the housing and applying a biasing force to the second heat sink toward the lens;
• and
• a light emitter positioned adjacent to the lens and configured to emit light through the central opening after passing through the lens.

An edge-lit luminaire comprising:

• a housing having a central opening and a first surface disposed around the central opening;
• a first heat sink coupled to the first surface;
• a biasing member coupled to the housing and applying a biasing force to the first heat sink toward the central opening;
• a lens including a plurality of extraction features substantially evenly distributed over a lens area, the lens positioned proximate the central opening;
• a light emitter coupled to the first heat sink and positioned adjacent to the lens, the light emitter configured to emit light through the central opening after passing through the lens;
• and
• a reflector positioned substantially covering a surface of the lens outside of the central opening.