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Lighting : LIGHTING Feb-Mar 2018
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38 LIGHTING MAGAZINE | February/March 2018 Table 7. Examples of warehouse aisles with NCC2019 adjustment factors applied NCC2019 case scenario Low ceiling height, vertical, target = 160 lux, RAR adjustment applied, no controls RAR = 0.5 High ceiling height, vertical target = 160 lux, RAR adjustment applied, motion sensor no daylight harvesting RAR = 0.2 High ceiling height, vertical target = 160 lux, RAR adjustment applied, motion sensor + daylight harvesting RAR = 0.4 Vertical target = 160 lux, no RAR adjustment applied, motion sensor, no daylight harvesting RAR >1.5 Vertical target = 160 lux, no RAR adjustment applied, motion sensor + daylight harvesting RAR > 1.5 Max IPD from Table 6.2a 2.5 2.5 2.5 2.5 2.5 Area 90 60 60 1 1 Perimeter 66 46 46 1 1 Ceiling height 3 8 3 1 1 RAR 0.5 0.2 0.4 2.0 2.0 RAR adjustment factor 0.65 0.55 0.64 1 1 Max IPD AFTER RAR (adjusted if under 1.5) 3.8 4.5 3.9 2.5 2.5 Controls A = 1 0.4 0.4 0.4 0.4 Controls B = 1 1 0.6 1 0.6 Controls adjustment factor multiplied 1 0.4 0.32 0.4 0.32 Max IPD after controls adjustment 3.8 11.3 12.1 6.3 7.8 CRI >90 1 1 1 1 1 Max IPD after lx quality adjustment 3.8 11.3 12.1 6.3 7.8 CCT <3,000K 1 1 1 1 1 Max IPD after lx quality adjustment 3.8 11.3 12.1 6.3 7.8 Table 8. Examples of warehouse aisles with NCC2016 adjustment factors applied NCC 2016 case scenario Low ceiling height, vertical, target = 160 lux, RAR adjustment applied, no controls RAR = 0.5 High ceiling height, vertical target = 160 lux, RAR adjustment applied, motion sensor no daylight harvesting RAR = 0.2 High ceiling height, vertical target = 160 lux, RAR adjustment applied, motion sensor + daylight harvesting RAR = 0.4 Vertical target = 160 lux, no RAR adjustment applied, motion sensor, no daylight harvesting RAR >1.5 Vertical target = 160 lux, no RAR adjustment applied, motion sensor + daylight harvesting RAR > 1.5 Max IPD from Table 6.2a 8 8 8 8 8 Area 90 60 60 1 1 Perimeter 66 46 46 1 1 Ceiling height 3 8 8 1 1 RAR 0.5 0.2 0.2 1.0 1.0 RAR adjustment factor 0.65 0.55 0.55 0.83 0.83 Max IPD AFTER RAR (adjusted if under 1.5) 12.3 14.4 14.4 9.6 9.6 Controls A = 1 0.7 0.7 0.7 0.7 Controls B = 1 1 0.6 1 0.6 Controls adjustment factor multiplied 1.00 0.70 0.56 0.70 0.56 Max IPD after controls adjustment 12.3 20.6 25.8 13.7 17.1 Other changes Other changes recommended for Section J6 include: l Updating the wording of Section J6.2a (b) (B) to incorporate the use of LED and drivers on track systems l Making mandatory { the use of a luminaire with a standby power mode and occupancy sensor in fire stairs { the use of daylight sensors in a foyer, corridor or other circulation space with windows and >250W of lighting power { the use of motion sensors in cark park entry adjustment zones l Replacing the minimum efficacy of external perimeter lighting with >100W of lighting power with the requirement to use LED luminaires for 90 percent of the total lighting load. INDUSTRY FEEDBACK AND RESPONSES In June 2017 comment was sought from the lighting industry with a particular view to identifying unintended consequences from the proposed changes. Industry feedback indicated concern that the low IPDs would: l not be achievable in areas with lower illuminance such as car parks and amenities with obstructions such as columns and partitions, and in corridors l encourage the use of high colour temperature, very cool LEDs due to their high efficacy at a lower cost and create unpleasant lighting environments l discourage the use of low colour temperature, warm LEDs due to their low efficacy at a higher cost at the detriment of a pleasant, comfortable lighting environment. l discourage the use of high CRI LEDs in particular in medical facilities and retail environments l banning the use of indirect light To address these concerns the ABCB and Energy Action have increased the maximum IPD requirements for corridors, amenities and car parks and added additional adjustment factors to the draft to: l reward the use of low or warm colour temperature (CCT) lighting l reward the use of high colour rendering index (CRI) lighting l penalise the use of very high or cool colour temperature (CCT) lighting. IPD based on AS/NZS1680 recommended illuminance Concerns were raised that lowering the maximum IPD would adversely affect the vision impaired. The basis for setting the maximum IPD has remained unchanged since the inception of Section J6 which is based on AS/NZS1680.2 recommendations for minimum illuminance requirements.
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