Daylight harvesting controls may be considered in patient roomapplications, especially for the lighting zones nearest the windows.
Lighting power reductions during daylight hours have been as high as87% in this application (Brown et al. 2005), However; patient controlof their environment is an overriding priority, and automatic controlsshould not override the ability to manually control the lights,This makesthe potential energy savings challenging to quantify.
1.9 Electrical Lighting Design
The 1.0 W/ft2 LPD represents an average LPD for the entire building,Alternatively, individual spaces may have higher power densities if theyare offset by lower power densities in other areas. In this space-byspacemethod, calculate an overall lighting power allowance for the entireproject by adding the products of the individual space type areas.