Patent ID: 9215774
Filing Date: 2015-12-15
Classification: H05B,Y02B

Abstract:
1. A method for operating a lamp comprising a first light emitting means for direct lighting and a second light emitting means for indirect lighting of an object, a controller configured to control the first light emitting means and the second light emitting means separately, and wherein the lamp has at least one light sensor mounted on the lamp to detect the total amount of light in the range of the light sensor including any extraneous light present, wherein the light sensor is connected to the controller, the controller having means to subtract from the total amount of light detected by the light sensor, a calculated amount of light produced by the second light emitting means and the indirect light amount that is incident to the light sensor, and a function of the signals reaching the light sensor, and from the amount of direct light produced by the first emitting means, combined with any extraneous light incident to the light sensor in order to control the lamp, in particular to switch it on or off.