Pattern blue glass lamp bases are reproductions of antique lamp bases Circa 1890"s. Hurricane style lamp bases can be used with lamp oil or electric burners to create your perfect lamp. Blue glass lamp bases have brass #2 collars and use #2 oil or electric burners and 3" bottom fitter glass chimneys. Shade holders are also available for 10" student shades for larger bases and 7" student shades for smaller Bullseye pattern bases.