Retrofit

Retrofitting Strategy	Use of smart lighting control platform
	Addressable lighting system can integrate occupancy and day light sensors, timer etc. to control individual lights or by separate zones.
	Consideration
	This can maximise the energy savings and also best suit the conditions and preference of individuals or different zone areas.
	Estimated Saving
	å(kW_LGT_i,PRENLGT_i,PRELF_i,PREOPHR_i,PRE)yr – å(kW_LGT_i,POSTNLGT_i,POSTLF_i,POSTOPHR_i,POST)yr Where i is the effective zone of building å(kW_LGT_i,PRENLGT_i,PRELF_PREOPHR_i,PRE)yr = [kW_LGT_1,PRENLGT_1,PRELF₁hr₁/day day₁/wk + …. + kW_LGT_i,PRENLGT_i,PRELF_ihr_i/dayday_i/wk]52 å(kW_LGT_i,POSTNLGT_i,POST LF_POSTOPHR_i,POST)yr = [kW_LGT_1,POSTNLGT_1,POSTLF₁ hr₁/dayday₁/wk + …. + kW_LGT_i,POSTNLGT_i,POSTLF_ihr_i/dayday_i/wk]52 LF_i = 1 for ON/OFF control under normal operating time of premises LF_i = (1 – 0.33*0.33) = 0.9 for 33% of power reduction (dim-down to 50% lux level) at 33% of time as an example Please click HERE to view the list of terminology.