Control of glare from sunlight – transmittance value Created: 16th Apr 2018 Reference: KBCN1089 Transmittance values should be based on those quoted for ‘visible’ or ‘optical’ light transmittance. 23 Mar 2021 - Reference to the term 'optical' added, for clarity This KBCN aligns with KBCN0709 of UKNC 2014
