concave or conical shaped configuration also if desired instead of a halogen light an incandescent light bulb 22 or an led light emitting diode or laser type light may be located within the transparent cover or if desired any of these visible light sources can be used without a cover in the embodiment illustrated in fig1 3 a vertical black light source or tube 60 is also shown thus any desired combination light arrangement may be provided or the combination light arrangement may be limited to any one of the above noted light sources the lamp assembly 10 preferably has a substantially solid base portion 40 for supporting the upper portion of the lamp assembly 10 and a substantially vertical stem generally designated by reference number 50 connecting the cover 20 to the base portion 40 preferably the black light source 60 is located within the stem 50 the stem 50 has a first end 51 and a second end 52 preferably demountably connected to the cover 20 and the base portion 40 respectively so as to allow for example for easy removal of the black light source 60 when it requires replacement in the first embodiment of fig1 the stem 50 is comprised of multiple support rods 53 preferably.