Hi all!AlanF said:Near-white concrete will also feel far hotter than grass. Try it - also guaranteed. The transfer of heat is far more complicated than just colour.
Grass is not the kind of "material" to take into account for such a comparison. Vegetables (and all living tissues) contain water and transpire, water evaporation abstracts heat and lowers the temperature.
Neuro's first post is spot on.
C'mon Canon, how long for the first sweating lens with built-in water tank to keep the temperature constantly low? ;D ;D ;D