To determine your table size measure the playing field from tip of the bumper to the opposite bumper & compare the measurements to the chart below.
Never stand on your pool table to hang your light.
Positioning a light over your table
For a 9' pool table hang the light 83" off the side wall & 108" off the end wall to have minimum clearance for the cues to the playing field when the table is centered on the light.
For a 7' pool table hang the light 78" off the side wall & 97" off the end wall to have minimum clearance for the cues to the playing field when the table is centered on the light.
For an 8' pool table hang the light 80" off the side wall & 102" off the end wall to have minimum clearance for the cues to the playing field when the table is centered on the light.
How To Determine Your Table Size