Step tread luminaire

1. A step tread assembly comprising:

first and second step treads, the first step tread above the second step tread, the first step tread having a top and a bottom, the first step tread defining a hole extending through the first step tread including through the top and the bottom; and

a luminaire including a one-piece optic and a light source adapted to direct light into the optic, the optic including an upper portion adjacent the top of the first step tread, the upper portion adapted to emit light from the light source in a generally upward direction, the light emitted by the upper portion being decorative light to assist in the identification of the first step tread in low ambient light conditions, the optic further including a lower portion adjacent the bottom of the first step tread, the lower portion adapted to emit light from the light source in a generally downward direction, the light emitted by the lower portion being functional light to illuminate the second step tread below the first step tread, the optic further including a narrow portion connecting the upper portion and the lower portion, the narrow portion within the hole, the optic being resiliently flexible and secured within the hole in grommet-like fashion with the upper portion above the first step tread, the lower portion below the first step tread, and the narrow portion within the hole, the upper and lower portions sandwiching the first step tread therebetween.

2. A step tread assembly as defined in claim 1 wherein:

the hole includes an upwardly projecting peripheral lip; and

the upper portion of the optic includes a skirt around its perimeter, the skirt fitting over the lip of the hole.

3. A luminaire for mounting in a hole extending through a top and a bottom of a first step tread and above a second step tread, the luminaire comprising:

a light source; and

a one-piece optic operatively connected to the light source to receive light from the light source, the optic including an upper portion adapted to emit light from the light source in an upward direction, the light emitted in the upward direction being decorative light to assist in the identification of the first step tread in low ambient light conditions, the optic further including a lower portion adapted to emit light from the light source in a downward direction, the light emitted in the downward direction being functional light to illuminate the second step tread below the first step tread, the optic including a narrow portion connecting the upper portion and the lower portion, the optic being resiliently flexible so as to be capable of mounting within the first step tread hole in grommet-like fashion with the upper portion adjacent a top of the first step tread the lower portion adjacent a bottom of the first step tread, and the narrow portion within the hole in the first step tread, the upper and lower portions sandwiching the first step tread therebetween.

4. A step tread assembly as defined in claim 3 wherein:

the hole includes an upwardly projecting peripheral lip; and

the upper portion of the optic includes a skirt around its perimeter, the skirt fitting over the lip of the hole when the optic is installed in the hole.

5. A method of installing a luminaire within a hole in a step tread, wherein the method comprises:

providing a luminaire including a one-piece optic and a light source adapted to direct light into the optic, the optic being resiliently flexible, the optic including an upper portion, a lower portion, and a narrow portion connecting the upper portion and the lower portion, the upper portion emitting decorative light in a generally upward direction to assist in the identification of the step tread in low ambient light conditions, the lower portion emitting functional light in a generally downward direction; and

installing the luminaire within the hole in the step tread by installing the optic in the hole in grommet-like fashion by (a) cocking the optic so that the lower portion may pass through the hole and (b) depressing the optic into the hole (c) so that the lower portion resiliently flexes to fully pass below the hole, whereby the upper portion is adjacent the top of the step tread, the lower portion is adjacent the bottom of the step tread, and the narrow portion is within the hole in the step tread, the upper and lower portions sandwiching the step tread therebetween.

6. A method as defined in claim 5 wherein:

the hole includes an upwardly projecting peripheral lip;

the upper portion includes a skirt around its perimeter; and

the installing step includes fitting the skirt over the lip of the hole.