Light Bulbs and Artificial Lighting

# What energy is produced by a 60 W light bulb lit for 4.3 hours?

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first you have to conver 4.3 hours into seconds, which is 15480seconds and then you multiply that by the power which is 60 W, which then you get 928800 Joules

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## Related Questions Most of the energy in a light bulb is heat energy.   A light bulb produces heat and light. A more efficient bulb produces more light and less heat. Light, of course, since that's what the light bulb is designed to produce. There is also waste energy, as heat, and (to a small extent) as sound. The energy used by a lightbulb in kWh can be calculated from the voltage across the bulb, the current through the bulb, and the number of hours of operation of the bulb. energy = voltage * current * hours / 1000 Not in energy used. But possibly in light produced. The useful energy that comes out is light energy. Heat energy is also produced but is not useful Look at the watt rating printed on the bulb, then multiply by the number of hours it runs for, the answer is the energy in watt-hours. A light bulb doesn't 'produce' energy. But if it's conducting electric current, then it converts electrical energy to other forms, namely heat and light.  A light bulb of 60 watts if we leave it on for an hour it will use 60 watt hours or .06 kWh. Mechanic energy is converted in to light bulb , in bulb the electric energy converted into heat and light In a light bulb, electrical energy is transformed into light energy and heat energy. The battery produces electrical energy. If the light bulb is connected between the terminals of the battery, then the bulb will change the electrical energy into heat, and if you're lucky and you have the correct voltage, also maybe some light. Energy does not happen. Electrical energy is routed through a light bulb, and some of it is converted to heat energy and light energy inside the bulb. It can be both. The energy we receive from the Sun can be considered a raw material; the light produced by a light-bulb is an end-product. A light bulb turns electrical energy into light and heat energy. Electricity is the source of energy in a light bulb. A light bulb uses electrical energy, and produces light, as well as heat. light and heat energy occur in a light bulb when it is turned on. A light bulb is not an example of electromagnetic energy, but the light which the bulb gives off is an example of electromagnetic energy. A 250 watt light bulb takes 250 watts of power. The energy it uses (that you pay for) is measured in watt-hours or kilowatt-hours. A 250-watt bulb running for 4 hours uses 1 kilowatt-hour. If you mean could you use the light from a bulb to energize a solar array or photovoltaic cell, the answer is yes. However the energy to run the bulb would exceed the energy produced by the array so you would have a net loss of energy in such a system. When lighting a light bulb, it is changed into light and heat/thermal energy.

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