corresponds to an improper rack position and a light on mode that corresponds to a proper rack position in the first alternate embodiment a red light on mode corresponds to an improper rack position and a green light on mode corresponds to a proper rack position in this embodiment the user is assured that rack assembly 32 is powered even when rack assembly 32 is not yet positioned in a second alternate embodiment the second alternate embodiment is substantially identical to the first embodiment except that rather than incorporating an electromagnetic reed switch the second alternate embodiment incorporates a hall effect sensing proximity switch such hall effect sensing switches are well known in the art such a hall effect sensor switch is taught in the disclosed aug 30 2008 u201c hall effect sensor u201d wikipedia article which is expressly incorporated herein in its entirety in a third alternate embodiment the third alternate embodiment is substantially identical to the first embodiment except that rather than incorporating an electromagnetic reed switch the third alternate embodiment incorporates a photoelectric sensing proximity switch such photoelectric sensing proximity switches are well known in the art such a hall effect sensor switch is taught in the disclosed aug 30 2008 u201c proximity sensor u201d wikipedia article which is expressly incorporated herein in its entirety in a fourth alternate embodiment the fourth alternate embodiment is substantially identical to the first embodiment except that rather than reed switches 38 and 40 lights 42 and 44 and battery 46 being mounted to rack 32 reed switches 38 and 40 lights 42 and 44 and battery 46 are mounted to billiard table 20 and rather than magnetic targets 24 and 26 being.