Lights can run on electric power, gas or acetylene.
A traffic light uses electrical energy to power the lights, which then emit light energy as signals to control traffic flow.
A condenser microphone uses phantom power.
A light bulb that uses a filament is also known as an incandescent light bulb.
There are an abundince of uses of that type of power and asking for all of them is a bit ridiculious.
A flashlight typically uses chemical energy stored in batteries to power the conversion of electrical energy to light energy through a bulb or LED.
An LED flood light uses a fraction of the power of a traditional flood light. It uses less then 1/4 the the power. They also last much longer the traditional flood lights.
fluorescent, LEDs
Depending on the type of under cabinet light this could vary. The Kichler Xenon Bright Disc Power uses 12 volts, while some smaller less expensive lighting uses less.
When a light bulb is turned on, it uses a certain amount of power, measured in watts. The power consumption of a light bulb can vary depending on its wattage, with higher wattage bulbs using more power. For example, a 60-watt bulb uses 60 watts of power when turned on.
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A simple circuit that uses only one device would be a battery connected to an LED light. The battery provides power to the LED, causing it to light up. This type of circuit is commonly used in handheld flashlights.
More watts means it uses more energy per second (watt is a unit of power). If it is a light-bulb of the same type of technology, the higher-watt light bulb would also give off more light.