1. A method of estimating spectral contributions in ambient light, comprising: receiving a light measurement of a mobile device, the light measurement having a spectral response; receiving a location and a time associated with the light measurement of the mobile device; providing a spectral correction factor appropriate to the location and the time associated with the light measurement of the mobile device; scaling the light measurement of the mobile device by the spectral correction factor to obtain a target measure; detecting light within two or more differing fields of view; and scaling the light measurement of the mobile device with a correction factor based upon the detected light within the two or more differing fields of view.