In embodiments of mobile device child share, a mobile device can display a default device lock screen on an integrated display device, and receive an input effective to transition from the default device lock screen to display a child lock screen without receiving a PIN code entered on the default device lock screen. The controller may include a user interface that can be utilized to initiate a scheduling routine having a separate schedule review mode for displaying one or more schedule parameters of the controller without initiating the editing mode. The threshold voltage is adjusted in response to drain voltage of the second transistor. The LED bulb also has a heatsink between the shell and base.