lighting apparatus, installations and units; computer controlled lighting management systems; electronic lighting control apparatus; occupancy detection apparatus to allow automatic switching of lighting and manual override apparatus for use with the aforesaid goods apparatus and instruments for controlling lighting; computers and computer software for use in the control of lighting; low voltage and mains voltage track systems to give flexibility of location and relocation of surface mounted luminaires; systems for pre-programmed automatic testing of emergency invertors and batteries with status feedback to the user; intelligent control systems to optimize power consumption of lighting; electronic transformers; ballasts; parts and fittings for all the aforesaid goods