High bay luminaire
An optic for a light emitting diode array comprises an arrangement of optical structures for providing one or more down lighting distribution from the LED array; and a waveguide edge for providing one or more up-lighting distributions from the LED array. Luminaires are described comprising a light emitting diode (LED) array and the optic. Lighting systems are described comprising a plurality of the luminaires arranged over an area enclosed by walls.
1. An optic for a light emitting diode (LED) array comprising:
a radial arrangement of optical structures for providing one or more down lighting distributions with a first portion of light received from the LED array; and
a radially extending waveguide edge providing one or more up-lighting distributions with a second portion of light received from the LED array.
2. The optic of claim 1 , wherein the optical structures are arranged in concentric rings.
3. The optic of claim 2 , wherein the optical structures vary in number and/or dimension between the concentric rings.
4. The optic of claim 1 , wherein the optical structures are micro-scale optical structures.
5. The optic of claim 1 , wherein the optical structures are Fresnel structures.
6. The optic of claim 1 , wherein single optical structures are positioned over each LED in the LED array.
7. The optic of claim 1 , wherein the second portion of light is 5% to 20% of total light produced by the LED array.
8. The optic of claim 1 , wherein the optic is a single piece.
9. The optic of claim 1 , wherein the optic comprises two or more pieces.
10. The optic of claim 9 , wherein each of the two or more pieces comprises the radially extending waveguide edge.
11. The optic of claim 1 , wherein the up-lighting distribution has an angle of 5-30 degrees from a plane normal to nadir.
12. A luminaire comprising:
a light emitting diode (LED) array; and
an optic covering the LED array, the optic comprising a radial arrangement of optical structures for providing one or more down lighting distributions with a first portion of light received from the LED array, and a radially extending waveguide edge providing one or more up-lighting distributions with a second portion of light received from the LED array.
13. The luminaire of claim 12 , wherein the optical structures are arranged in concentric rings.
14. The luminaire of claim 13 , wherein the optical structures vary in number and/or dimension between the concentric rings.
15. The luminaire of claim 12 , wherein the optical structures are micro-scale optical structures.
16. The luminaire of claim 12 , wherein single optical structures are positioned over each LED in the LED array.
17. The optic of claim 12 , wherein the optic comprises two or more pieces.
18. The optic of claim 17 , wherein each of the two or more pieces comprises the radially extending waveguide edge.