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The one with a high number of Watts left on for a long time.
(Your neighbour's 500W garden floodlight that's left on all night.)
The energy a lightbulb uses is it's power multiplied by the amount of time it is used for. A lightbulb's power is measured in Watts (W).
The old fashioned incandesant bulbs are often 40W, 60W or 100W, but much of the energy they use produces heat not light - not very efficient.
Mains or 12Volt halogen bulbs are usually 50W, 35W or 20W - these still produce wasted heat but are more efficient than incandescent bulbs.
Low energy bulbs are only 7W, 9W or 11W and are very efficient hardly any energy wasted as heat.
LEDs are low power e.g. 3W and also very efficient - but often less bright.
So the lightbulb that uses the most energy is one with a high number of watts left on for a long time.
What else can I help you with?
Which organ in the human body uses the most energy?
The brain is the organ in the human body that uses the most energy.
Which winter sport uses the most energy?
Probably snowboarding uses most energy because its hard and you have to train a lot.
Which region uses the most tidal energy?
Coastal areas uses most tidal energy. Tides are formed in the oceans.
What of your daily stuff uses the most energy?
A car uses the most energy of your daily stuff!!! a car uses about 65% of all energy in the day!!! your house/home only uses about 40% of the energy!!! In your house a toilet uses about 70% off all water you use in a day!!!
Which country uses the most nuclear energy?
France uses the most nuclear energy in the world with the United States of America in second.
What is the complete subject in Hovering uses the most energy?
The complete subject in the sentence "Hovering uses the most energy" is "Hovering." It refers to the act of hovering, which is the main focus of the sentence. The phrase "uses the most energy" is the predicate, describing what the subject does.
What are common uses of nuclear energy?
Most uses include energy and weapons although some nuclear energy is used for materials.
Which country uses the most energy of all kinds?
it is my but
What product uses the most energy?
Television or computer.
What uses the most energy in the body?
The brain uses the most energy in the body, accounting for about 20% of the body's total energy consumption. Other organs, like the heart, liver, and kidneys, also require substantial amounts of energy to function properly. Muscles can also consume a significant amount of energy during physical activity.
Which country uses the most solar energy?
China is the country that uses the most solar energy. It is a global leader in solar energy production and has made significant investments in solar technology and infrastructure.
Which Canadian province uses the most energy of any kind?
Ontario, which uses nuclear thermal energy, using 78% of the energy in entire country.
