The exterior of our home is stucco. As we are going to try to get our home certified green by the FGBC, beyond being Low-VOC or no-VOC they also require an exterior paint with at least a 50% reflectance value. What does this mean? "Light Reflectance Value (LRV) is the total quantity of useable and visible light reflected by a surface in all directions and at all wavelengths when illuminated by a light source.LRV is a measurement that tells you how much light a color reflects, and conversely how much it absorbs. LRV runs on a scale from 0% to 100%. Zero assumed to be an absolute black and 100% being an assumed perfectly reflective white. An absolute black or perfectly reflecting white do not exist in our everyday terms. The average blackest black has a LRV of approximately 5% and the whitest white is approximately 85%. Some yellows can measure up into the 80's or 90's as well." (from colorstratagies.net)"
I am going to start small on this one and go to the home depot and see what is already mainstream. All paints have a LRV rating right on the container apparently.
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