Daylight factor DF = SC + ERC + IRC
{"Image DocumentName": "Daylight factor DF = SC + ERC + IRC", "Image ImageDescription": "Interior daylight is measured using a parameter known as the Daylight Factor (DF). The daylight factor is defined as: The Daylight Factor is a combination of 3 separate. components: The sky component (SC) \u2013 the light received directly from the sky. The externally reflected component (ERC) - the light received directly by reflection from buildings and obstructions outside the room. The internally reflected component (IRC) - the light received from surfaces inside the room. DF = SC + ERC + IRC. Estimates for the SC and ERC can be obtained from a number of sources, including: BRE Daylight Protractors (BRE, 1990). BRE Simplified Daylight Tables (BRE, 1990). Waldrum Diagrams (BRE, 1990). Fuller Moore Dot Charts (Moore, 1991). The IRC can be obtained from tabulated data (BRE, 1990).", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}