An LED lamp with an integrated circuit, a rectifier, and a string of series-connected LEDs rectifies an incoming AC signal. Aspects of the methods are equally appropriate for numerous structures, including but not limited to, studs-up and studs-out configurations or a \u2018wall\u2019 style mosaic or a \u2018floor\u2019 style mosaic. The second charge pumping part pumps the switching voltage, in response to the first voltage, to output a second voltage that is lower than the first voltage that is varied in accordance with time.