How numerous Lumens is the Sun?

When world ask the question, "How plenty of Lumens is the Sun?", an ext often 보다 not, there is another question they room really trying come answer. The underlying question may simply be the end of basic curiosity, yet usually we space trying to construct some kind of intuitive knowledge of just how much light a lumen represents. We room bombarded with specifications because that headlamps, flashlights, at home lighting, out lighting, LED lights, grow lights, incandescent, fluorescent, halogen, and the list goes on and on. We all have lots of suffer with the sun and how bright the is under a variety of different circumstances. We space trying to relate our experiences to all these marketing specifications. It deserve to be very confusing.

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I"ll try to clarification a variety of these underlying concerns by reformulating the initial question a number of different ways and then carry out answers to this new, and also hopefully much more helpful questions. 

How countless Lumens go the sun Produce?

Another means to asking this, and the question we"ll answer first is, "What is the complete amount of visible light the is developed by the sun?" A lumen is a details quantity of visible light. The sunlight produces a large spectrum of electromagnetic energy. Every the way from radio, microwave, infrared, visible, ultraviolet, x-ray, gamma, and cosmic rays. However the quantity of the lumen is only concerned with the narrow band of visible light.


Using data derived from ground-based solar telescopes, an are shuttle missions, satellites, sound rockets, high-altitude aircraft, and also computer models, scientists and engineers in the space and solar energy neighborhoods have standardization on a worth for mean spectral irradiance for earth. This quantity, additionally known together the solar constant, is 1366.1 watt per square meter. Just put, this is how bright the sun is in ~ the street of earths orbit. Another method to think around it is if you had a one meter through one meter solar panel riding on a satellite and also it was oriented perpendicular come the sun"s rays and also 100% efficient across the whole electromagnetic spectrum, that would develop 1,366 watt of electricity. That"s right around enough electrical energy to power a good blow dryer.


However, this is for the full spectrum the the sun. Since we are only came to with clearly shows light, we require to change this number come account for only what the eye is sensitive to. The method to do that is to either solve the above integral, or you can just take my word because that it. Because that our sunlight or any star with a black body temperature the 5778 K, the price is 93. For every watt our sunlight puts out, it produces 93 lumens of visible light. So in ~ earth"s orbit, for each square meter, our sunlight puts out 127,000 lumens. That is an extremely bright. No wonder it hurts to rigid at the sun. Better get some stylish sunglasses and put on that sunscreen just in case.


Now let"s discover the area of the ball that has a radius matching to the earths distance from the sun. So v the radius same to 92.96 million miles, one expensive unit, or 149.6 billion meters, the area is 281,229,000,000,000,000,000,000 or 281.2 sextillion square meters. Currently we simply multiply that with 127,000 lumens every square meter and we obtain the grand total of 35,730,000,000,000,000,000,000,000,000 lumens.

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Our sun puts the end 35.73 octillion lumens. That"s a most sunlight and also just a little bit brighter than the brightest headlamp. I absolutely don"t desire to it is in the one buying batteries for it. Probably we can use rechargeable lithium ion batteries... Solar rechargeable!

How numerous Lumens of sunlight Hit the Earth?

The dimension of the sun and also the earth in the photo at the peak of this short article are to scale. However, the distance in between them is extremely compressed. Also so, the is evident that the vast majority of sunlight does no hit the earth. It deserve to be calculation by acquisition the proportion of the surface locations of a 1 AU radius sphere and also a circle through the radius the the earth. These quantities are 281.2 sextillion square meters and 127.8 trillion square meter respectively. This proportion tells united state that over there is 2.2 billion times an ext light that doesn"t fight the planet than does. Utilizing this ratio we can calculate that there room 16.24 quintillion lumens of sunlight that struggle the earth.