Wall Colours

[Anonymous]

Hi,

I am doing some daylighting analysis with ecotect and radiance. I am trying to change my interior wall values to determine the effect of different colour paints but i am having some troubles with the reflectance. When i select a white colour, it says the reflectance is unrealistically high, so i drop it down to a level that is acceptable and the lightest colour i can get is a grey. I understand that you cant get a "pure white" paint, but it seems that most paints would be whiter than what i get at the maximum reflectance value. Can somebody explain this to me?

Cheers,
Mark