Checklists - THORN Lighting

Building ProjectLuminaire type (1)Luminaire dataNumber of lamps per luminaire (2)System power of luminaire (W) (3)Operating dataService life of system (years) (4)Annual burning hours (5)Lamp replacement interval (years) (6)Luminaire cleaning interval (years) (7)Room cleaning interval (years) (8)Number of luminairesLamp lumens maintenance factor (9)Lamp survival factor (10)Luminaire maintenance factor (11)Room surface maintenance factor (12)Maintenance factor [ (9)x(10)x(11)x(12) ] (13)Number of luminaires (14)Itemised investment costsCost of one luminaire (15)Cost of one lamp (16)Installation costs per luminaire (17)Itemised operating costsCost of lamp replacement (18)Cost of luminaire cleaning (19)Cost of room cleaning (20)Energy costs per KWh (21)%Energy savings due to control system (22)Investment costsLuminaire costs [ (14)x(15) ] (23)Lamp costs [ (14)x(2)x(16) ] (24)Installation costs [ (14)x(17) ] (25)Investment costs [ (23)+(24)+(25) ] (26)Operating costsRoom cleaning costs [ (20)x(4) / (8) ] (27)Luminaire cleaning costs [ (19)x(4) / (7) ] (28)Lamp replacement costs [ (18)x(4) / (6) ] (29)Energy costs [ (14)x(3)x(4)x(5)x(21)x(22) / 1000 ] (30)Operating costs [ (27)+(28)+(29)+(30) ] (31)Annual operating costs [ (31) / (4) ] (32)184 | ChecklistsExistinginstallationPay back period* = (26)Proposed – (26)Existing (years)(32)Existing – (32)ProposedPay back period* = – = years–*excludes depreciation and interest0000ProposedinstallationWorksheet 7.2