Patent ID: 9313848
Filing Date: 2016-04-12
CPC Classification: H05B

Claim Text:
1. A method of lighting at least part of a space, using a light emitting diode (LED) string provided on a support, the LED string comprising a first LED segment and at least a second LED segment, which are connected in series, each LED segment comprising at least one LED, the LED string being powered by a rectified dimmable AC voltage, wherein the first LED segment is powered when the rectified dimmable AC voltage is above a first voltage level, and the first LED segment and the second LED segment are powered when the rectified AC voltage is above a second voltage level higher than the first voltage level, wherein the first LED segment is arranged to radiate light in a first beam to a first volume of the space, and the second LED segment is arranged to radiate light in a second beam to a second volume of the space, the first volume being at least partly different from the second volume, wherein one of the following two features is included: (1) the first LED segment and the first volume are disposed at a first side of the support above the support, and the second LED segment and second volume are disposed at a second side of the support below the support, and (2) the second beam is wider than the first beam, and the second volume includes the first volume, and wherein the ratio of at least one property of the light generated by the first LED segment and by the second LED segment changes with the dimming level of the rectified dimmable AC voltage.