Check @ office lighting: Spray paint inexpensive clip lights from hardware stores. OMG this is brilliant! Best thing is we already have 2 of these that we used to clamp on the fence of our old house for our bonfire parties.
DIY: glass orb cluster light/ A cheaper way-glass christmas ornaments in different sizes, just make sure that the wattage of the bulb is low(so glass doesn't break). I would spray the gold ornament tops with Krylon's, Looking Glass spray paint.