in step s 2 the light sensor 33 can measure the amount of light that strikes the sensor 33 and the light sensor 33 can transmit the light level signal u03b1 to the receiver 27 as shown in step s 3 the receiver 27 can communicate the light level signal u03b1 to the controller 25 as shown in step s 4 in step s 5 the controller 25 can analyze the light level signal u03b1 for example the controller 25 can estimate a brightness of an area of the building 11 including the light 16 the controller 25 can compare the light level to a predetermined value e g an amount of light comfortable for an ordinary person or can analyze the light level signal u03b1 in some other manner depending on the light level signal u03b1 the controller 25 can control the light 16 in various ways for example as shown in step s 6 the controller 25 can adjust the brightness of light produced by the leds 26 if the light level signal u03b1 indicates the amount of light detected is too high the controller 25 can dim the leds 26 or turn a subset of the leds 26 off alternatively if the amount of light is too low the controller 25 can increase the brightness of the leds 26 or turn on a subset of the leds 26 that were previously off thus the controller 25 can correct the amount of light provided by the light 16 in response to changes in ambient light such as if a level of natural light entering the area of the building 11 including the light 16 increases or decreases or if other lights are turned on or off in another example not illustrated the.