Flameless candle with photodetector

A flameless candle, comprising:

• a body including a translucent shell surrounding an interior region;
• a light source configured to emit a light to emulate a candle flame;
• a photodetector positioned within the interior region and configured to detect light transmitted through the translucent shell;
• circuitry configured to detect a state of a user input, detect a voltage across the photodetector, and selectively control the light source based on the state of the user input and the voltage across the photodetector, wherein the user input comprises at least one of a switch or a wireless receiver configured to receive a signal from a remote control, wherein the user input has at least three states, including constantly OFF, constantly ON, and a dusk-based mode state;
• and
• wherein the circuitry is configured to:
• at any given time, implement only one of (a) keep the light source constantly OFF when the user input is in the OFF state, (b) keep the light source constantly ON when the user input is in the constantly ON state, or (c) implement a dusk-based mode when the user input is in the dusk-based mode state;
• and
• when the user input is in the dusk-based mode state, cause operations such that while the light source is OFF, compare the voltage of the photodetector to a first threshold, and when the voltage transitions to less than the first threshold, cause the light source to turn ON, and while the light source is ON, compare the voltage of the photodetector to a second threshold, and when the voltage transitions to greater than the second threshold, cause the light source to turn OFF, wherein the first threshold is less than the second threshold.