The invention relates to copying light conditions from one location and pasting into or providing similar light conditions to another location in a lighting system. A light detector (20) is provided which comprises a first sensor (50) configured to receive a first light directly from a first light source (14) and measure first light attributes of the first light, and a second sensor (52) configured to receive the first light influenced by reflections from surfaces (24) and measure second light attributes of the first light. Processing means (16) are adapted to process perceivable light attributes at the first location (22, 24) from the first light attributes and the second light attributes, and in conjunction with the specification of the second light source (15) to control the second light source (15) to provide the second light having light attributes at the second location (23, 25) that substantially match the perceivable light attributes at the first location (22, 24), whereby the illumination at the first location (22, 24) may be copied and pasted to the second location (23, 25).