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Part LA 2021 sets out the requirements for Display Lighting in New Buildings:
i. have an average light source efficacy of 80 light source lumens per circuit watt
- Simply set the luminous efficacy for the display lighting system
ii. have a rated power usage no greater than 0.3W/m² in each space
- SBEM does not permit the input of display lighting power so this cannot be demonstrated in SBEM.
iii. the LENI method
- There is a tick box on the Lighting tab at building level, however, you will still need to input the correct lighting data to ensure the BER is appropriate. A separate LENI calculation will need to be provided.
Only ONE route to Compliance is required and only i can be demonstrated in SBEM
Note that any SBEM Compliance calculation with SBEM v6.1 will display options i and ii. Although SBEM does calculate the W/m² this is based on the Display W/m2 set for the Activity in the NCM Activity database so the status of this value (red/black) can safely be ignored.
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