You generally need the same number of volts for a given amount of light (lumens), regardless of how many hours you use it.
They typically measure the amount of energy used by a bulb in "watts", not volts, and you can find a wide range of wattage ratings from milliwatt LEDs to 1000-watt floodlights and on up.
18,000 J
To power a 100-watt light bulb with a 12-volt battery, you would need to divide the wattage by the voltage to find the current draw, which is 8.33 amps in this case. Then, depending on the capacity of the battery, you would need to calculate how many hours the bulb can be powered for.
Assuming the battery has a capacity of 4400mAh (typical for consumer-grade batteries), and the light bulb draws a continuous 44 watts, the battery would last around 1 hour before needing to be recharged. Remember that factors like battery efficiency, temperature, and age can affect this estimate.
A 200W light bulb will use 0.2 kWh (kilowatt-hour) of electricity per hour of operation. If the bulb is on for 5 hours, it would consume 1 kWh.
The power rating of a light bulb is measured in watts (W), which represents the amount of electrical energy it consumes per unit of time. If a light bulb has a power rating of 60 watts (for example), it means it consumes 60 watt-hours of energy in one hour of operation.
No, the wattage is determined by the resistance of the filament in the light bulb. The formula to determine the wattage is Watts = Voltage (squared)/Resistance in Ohms. To find the resistance of a 120 volt light bulb use the formula, Resistance in Ohms = Voltage (squared)/Watts. So for a 100 watt bulb at 120 volts the resistance is 120 volts x 120 volts = 14400/100 = 144 ohms. For a 60 watt bulb at 120 volts the resistance is 120 volts x 120 volts = 14400/60 = 240 ohms. As you can see this holds true to Ohm's law, current is inversely proportional to the resistance of the circuit. The higher the resistance of a load, the harder it is for the current to flow. In this case less current results in less light being emitted from the filament in the light bulb.
18,000 J
To remove the same amount of heat as a light bulb in an hour (about 60 watts), approximately 200 ml of sweat would need to evaporate per hour. This calculation is based on the heat of vaporization of sweat and the rate of heat production by a light bulb.
To power a 100-watt light bulb with a 12-volt battery, you would need to divide the wattage by the voltage to find the current draw, which is 8.33 amps in this case. Then, depending on the capacity of the battery, you would need to calculate how many hours the bulb can be powered for.
Assuming the battery has a capacity of 4400mAh (typical for consumer-grade batteries), and the light bulb draws a continuous 44 watts, the battery would last around 1 hour before needing to be recharged. Remember that factors like battery efficiency, temperature, and age can affect this estimate.
"A standard light bulb I would consider to be a 60 watt light bulb, and kilowatts are the amount of usage in a light bulb. From my research I have found that a standard 60 watt light bulb uses approximately 1.44 Kilowatts per hour."
A 200W light bulb will use 0.2 kWh (kilowatt-hour) of electricity per hour of operation. If the bulb is on for 5 hours, it would consume 1 kWh.
The power rating of a light bulb is measured in watts (W), which represents the amount of electrical energy it consumes per unit of time. If a light bulb has a power rating of 60 watts (for example), it means it consumes 60 watt-hours of energy in one hour of operation.
9000 BTU/hour is equivalent to 2300 watts so the heater will draw 10 amps on 230 volts.
Assuming an electricity rate of $0.12 per kilowatt-hour, running a 70-watt light bulb for 1 hour would cost $0.0084 or 0.84 cents. This calculation is done by converting watts to kilowatts (70W = 0.07 kW) and then multiplying by the cost per kilowatt-hour.
a normal incandescent 60 watt light bulb uses 60 watts of electricity to produce 20 watts worth of light, and 40 watts worth of heat. It is more of a heat bulb than a light bulb. it is great if you can capitalise on the free heat, but if it is not cold in your house, turn it off. is there a better bulb? no. why are they ideal? cheap (as low as 10 cents for the el cheapos), never change shape/design/size/compatability, make pleasant light I could go on for an hour, but the best bulb is the cheapest.
A 100 watt bulb uses 0.1 kilowatt (100 watts / 1000) per hour. At 15p per kilowatt-hour, the cost of running the 100 watt bulb for an hour would be 1.5p (0.1 kW * 15p).