| 摘要 |
A lighting apparatus (1,2) comprising optical elements (3), electrical elements and an attachment device (4). The optical elements (3) comprise a refractor (10) attachable to the attachment device (4). The refractor (10) comprises two planar members (101, 102) and an arcuate member (103) connecting the planar members (101, 102) to define a cavity (104). Each member having an inner and an outer surface. The optical elements (3) further comprising a light source (11) mountable within the cavity (104) of the refractor by means of a lampholder (11a) positioned in the attachment device (4). The refractor (10) further comprises a plurality of prismatic surfaces (101a, 102a, 103a) wherein at least one prismatic surface is the inner surface (101a, 102a) of at least one planar member and at least one prismatic surface is the outer surface (103a) of the arcuate member. |
