Abstract: A first LED driver circuit comprising: a first input interface (30) for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver (32) powered by the first output; a first shorting element (36) for shorting the first output; a first control arrangement (38) for controlling the first shorting element wherein the first control arrangement (38) is adapted to close the first shorting element (36) during only one subset of half cycles of the AC power input to short circuit the first LED driver (32) and to prevent the first LED driver (32) from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver (32) and, open the first shorting element (36) during the other subset of half cycles to allow the AC power input to power the first LED driver (32), when the second LED driver circuit is not powered by the

Abstract: A first LED driver circuit comprising: a first input interface (30) for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver (32) powered by the first output; a first shorting element (36) for shorting the first output; a first control arrangement (38) for controlling the first shorting element wherein the first control arrangement (38) is adapted to close the first shorting element (36) during only one subset of half cycles of the AC power input to short circuit the first LED driver (32) and to prevent the first LED driver (32) from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver (32) and, open the first shorting element (36) during the other subset of half cycles to allow the AC power input to power the first LED driver (32), when the second LED driver circuit is not powered by the

Abstract: A method and apparatus delays users from accessing a service via the world wide web in an orderly manner without maintaining a queue. When a user requests the service, if the service is busy, a web server does not allow access to the service: instead it configures the user's web browser via a script or applet to periodically retry requesting the service. A timestamp designating a time the user requested the service or other similar time is provided to the user and a count of timestamps issued in different periods are maintained by the web server. The web server periodically determines a cutoff timestamp corresponding to an available capacity of the apparatus using the count of timestamps it maintains. When the user retries requesting the service, the browser provides to the web server the timestamp it received from the server.