1 UMBRELLA WITH LIGHTING DEVICE BACKGROUND OF THE INVENTION [0001] This invention relates to an umbrella. [0002] A static light source for a room or similar environment is normally provided with a shade for diffusing the light from the conventional point source of light or deflecting the light into a particular selected region of the room. In addition static light sources require some form of base or stand to support the light source normally an electric light bulb and also to support the shade or other diffusing or deflecting arrangement associated therewith. SUMMARY OF THE INVENTION [0003] Therefore it is an object of the present invention to provide an umbrella with lighting device. [0004] The present invention has an umbrella with lighting device comprising an elongate support, a holder for a light source at or adjacent one end of said support, conductors for conveying electricity to the holder in use to operate the light source, and an umbrella having spokes radiating from the elongate support. [0005] In another preferred embodiment, the spokes are attached to a ring slidable along the support. [0006] In another preferred embodiment, including latching means whereby the slidable 2 ring can be located in a plurality of positions along the support, said positions include a position is stretched fully open and a position in which the umbrella is fully closed. [0007] In another preferred embodiment, the spokes are shaped to fit around the light source and holder therefore in the fully closed position of the umbrella. [0008] In another preferred embodiment, the umbrella shade forms part of a conventional umbrella having its stem attached along and adjacent to the elongate support. [0009] The present invention can be more fully understood by reference to the following description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0010] Fig. 1 is the drawings illustrates in partial cross-section of the umbrella with lighting device of the invention; [0011] Fig.2 is a similar part cross-sectioned view of the umbrella with lighting device of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012] The static lamp stand shown in Figure 1 comprises an upright column 10 formed from three circular cross-section tubes which are joined together over their length and are splayed apart at the lower end and curved around to form three curved feet designated 12, 14 and 16 respectively. At the upper end the three tubes terminate in a lamp-holder 18 into which is fitted a bulb 20. Immediately below the lamp-holder is arranged a collar 22 which 3 is a sliding fit on the column 10 and a conventional umbrella click stop 24 is provided for retaining the collar in the elevated position shown. Two intermediate click stops 26 and 28 are also shown and a lower end stop 30 is provided below which the collar 18 cannot move. [0013] Hinged to the collar are set a of conventional spokes one of which is designated by reference numeral 32 and the array of spokes supports an umbrella shade 34. The latter is formed from a decorative fabric which may be translucent or opaque depending on the particular use for the lamp. Where the lamp is intended to provide light throughout all the room the fabric is translucent but where it is to be used specifically for producing a pool of light on the underside then the shade can be less translucent and even opaque. [0014] An improved degree of floodlighting in a downward direction can be obtained by providing a reflective surface as by metalizing on the underside of the umbrella shade. Alternatively and preferably a reflector and/or lens unit may be incorporated above the lamp 20. [0015] Figure 2 of the drawings illustrates an alternative form of lighting device which is primarily intended to be a personal light source typically for use by an individual and primarily for use when it is necessary to use an umbrella because of inclement weather. [0016] The device comprises a conventional collapsing umbrella canopy 36 attached to a conventional array of spokes generally designated 38 which are attached to a conventional sliding collar 40 which is retained on and slidable along a handle stem or strut 42 having a curved or crook-like handle 44 at its lower end. [0017] The collar 40 is held in place by conventional spring catch at the upper end of the strut 42 (not shown). The strut 42 includes a transparent window at its upper end within 4 which is located a lamp-holder 45 into which is fitted a low voltage bulb 46 capable of being operated from one or more dry cell batteries. The strut 42 is of hollow cross-section at least over a section of its length near the handle end and as shown in figure 2 a penlight type battery 48 is held captive between sprung terminals 50 and 52 from which conductor means convey the current to the bulb 46 (the conductor not being shown in tire drawing). [0018] Between the position of the battery 48 and the lamp 46 is located a switch 54 by which the current to the bulb can be controlled. A reflector and/or lens (not shown) may be included within the transparent section of the strut above the lamp 46 to improve the flooding of light in a generally downward direction. In use the umbrella can be raised in conventional manner and in the event that the person using the umbrella wishes to have a pool of light either to assist in walking or to assist in for example reading a newspaper or the like whilst standing under the umbrella, the switch 54 is operated so as to illuminate the bulb 46. When not required the bulb is extinguished by turning off the switch 54. Although the bulb 46 and battery 48 have been shown integrally formed within the strut or handle of the umbrella it is to be understood that the invention also includes the provision of a detachable lamp housing at the upper end of the strut 42 and the use of a detachable battery housing both of which are securable to a conventional umbrella or flexible leads to a battery to be secreted about the person using the umbrella. Although not shown the switch 54 may be operated automatically upon the raising of the umbrella and to avoid unwanted operation of the bulb every time the umbrella is opened, preferably the switch is operated by pushing the collar 40 in an upward direction after it has been raised in the normal manner and clicked into place, the action of pushing the collar 40 in an upward direction causing a switch of the push-button variety to be operated with each upward push, so that the bulb can be illuminated by a first push and extinguished by a second push. Experiments carried out in connection with the second embodiment have shown it to be desirable to employ a bulb 46 having a built-in lens, preferably in conjunction with a reflector above the bulb, in order to provide-a useful spread of light beneath the umbrella with sufficiently high 5 illumination to enable the user to walk with confidence. Better illumination still could be achieved with a high voltage light source, which can be battery operated if an electronic step-up voltage converter is incorporated between the batteries and the lamp.