Abstract: A glass dome holder having an upper and a lower ring assembly for placing on the top and bottom of a glass dome. A plurality of spoke members connect the upper and lower ring assembly surrounding the glass dome and forming a unified structure. The upper ring assembly includes a J-bracket assembly including a J-bracket. A pair of connecting brackets are provided for connecting to a customer supplied U-bracket attached to a high bay unit. A socket and bracket assembly can be adjustably fixed to the connecting brackets. The hook portion of the J-bracket can be releasably fixed to the connecting bracket.