| 摘要 |
The present invention 10 discloses an internal prism 20 for displaying a rainbow onto a surface by separating the spectrum of white light produced by a halogen lamp 44. The lighting device has a cylindrical housing 16 having external means for adjusting the intensity of the display in the form of a three way dimmer switch 18. The prism 20 is selectively held in place by threaded stud members 22 with finger nuts 24 positioned at each end thereof, whereby the prism can be selectively moved or rotated from one position to another. Also shown is a planar opaque element or light filter 26 having a slot 28 therein whereby the light is projected through the prism. Also shown are a lamp cover 30, vertical slots 32 for receiving and adjustment of the threaded studs 22 along with a power source 34 and air intake vents 36 on the bottom of the housing 16. Alternative embodiments disclose a rotatable base 66 and a rectangular housing.
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