a lighting system includes at least one lighting apparatus having a light emitting element capable of emitting a controllably variable light output in a region . a position determination subsystem is capable of determining a position in three dimensions of at least one mobile entity within the region . a control subsystem is capable of variably controlling a light output of the at least one lighting apparatus according to the position of the mobile entity . the system may determine position by radio ranging with mobile electronic elements . the system may include multiple lighting elements and may determine light levels according to positions of multiple mobile entities . the system may include a database of information about lighting elements , mobile entities , and lighting plans that may be selected from mobile electronic elements .