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How many 290 lumen 7 watt light bulb is needed to power a 5 watt 12 volt solar panel?
Wiki User
∙ 14y ago
None, since one does not normally "power" a solar panel.
However a single 7w lamp would be useable with a 5watt panel but with reduced efficiency unless the panel was used to charge a battery first and then the bulb was powered by the battery.
Wiki User
∙ 14y ago
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How many watts equal 35 lumen's?
There is no direct conversion for this, because these are two separate things. Watts is actual power usage. "Lumens" is how much light is provided from a specified amount of power. The typical light bulb converts some of the electricity driven through it into light, and the rest into heat. The more efficient the light bulb, the less power per lumen will be required.That is why newer bulbs can be purchased that are 13 watts and advertised as equivalent to 60 watt incandescent bulbs - the light output is roughly equivalent (lumens), but the power usage is substantially different.
How do you transfer watt to lumen?
When measuring light, the lumen and the watt both measure power -i.e. the rate at which electromagnetic energy is emitted (for visible light, this 'power' is termed 'luminous flux'). Although they are both SI units, one (the lumen) is used in the photometric system of measurement, whereas the other (the watt) is used in the radiometric system of measurement. Whereas the watt is used to measure the total rate at which electromagnetic energy is emitted from a light source, the lumen is used to measure only the visible part of the spectrum and, then, corrected for the sensitivity of the human eye (the eye is most sensitive to the green part of the visible spectrum. The watt, of course, can also be used to measure the input power to a lamp.In the radiometric system, the input and output powers of a light are each expressed in watts, but in the photometric system, the input power of a light is expressed in watts, but the output power (luminous flux) is expressed in lumens. The ratio of a light's output (in lumens) to input (in watts) power, is termed efficacy (NOT 'efficiency'), and it various according to the type of light. An incandescent lamp, for example, has an efficacy of up to about 15 lumens per watt, whereas a fluorescent lamp has an efficacy of around 50 or so lumens per watt.
Are 2 lumens of light twice as bright as 1?
Two lumens of light is twice as much as one lumen of light, but it will not look twice as bright. This is because human perception of brightness is not linear, but follows a logarithmic pattern. The subject is very complex but generally twice as much light will only look about 30% brighter. To find out more search for "Weber-Fechner law", "Stevens' power law" and "perception of brightness".
What does MWp stand for in respect with solar power plant?
It is the nominal output of a solar panel measured as maximum power output under standard test conditions (STC) in a laboratory with light intensity is 1000W/m2. Manufacturers advertise and sell modules based on this value for solar panel efficiency, which is known as "Nameplate Rating" of solar panels or arrays. Needless to mention that the actual power output of solar panel in real life conditions is usually less than the nominal power output. Since various factors like weather and climate or the angle of incidence of the sunlight on the panels affects solar panel efficiency.
Should solar panel KW capacity equal to the total KW loads?
The total kW load is only a guide to the solar panel capacity. Any energy generated by the solar panel will reduce the energy you draw from the grid, which leads directly to less CO2 output at the power plants. But the power plant is still needed for when there is a cloudy day. When it's cloudy the solar panel output is drastically reduced, although they still produce power, as the salesmen are keen to emphasize, but what they don't tell you is that the power output is reduced by about 95%. Also, in many countries, if your panels generate excess electricity you sell it back to the grid, so the capacity of the panels is not critical.
How much candle power in 360 lumen?
Lumen and candlepower are not the same thing. Lumen measure the of light surrounds, like you would light a room with a lamp. Candlepower measures the light in a beam, like a flashlight beam. With a few assumptions you can convert lumen to candlepower. With these assumptions 360 lumen would be 28.6 candlepower.
How are solar cars powered?
Power from a light or the sun strikes a solar panel. The panel converts the light into useable power to operate the cars motor.
How are solar race cars powered?
Power from a light or the sun strikes a solar panel. The panel converts the light into useable power to operate the cars motor.
Can light transmit power?
Light can't transmit power, but can be transformed to electricity to run motors that converts to any kind of power. You need a light source and solar panel.
How we measure the efficiency of light sources in easy way?
I don't think there is an "easy way", not if you mean "home-made easy". You need devices to measure the amount of light produced (in lumen), and to measure the amount of power used. Then you would have to divide the first by the second, to obtain lumen/watt.
How can you tell if one solar panel takes in more light than another?
because a solar panel it has power
How many lumen output in a 50 watt power led?
Typically power leds operate as 1-2 watt units. 50 watt is a little excessive for a single led: it would have to be an array. The light output that can be achieved in normal use appears to range from 80-120 lumen/watt, so I guess the answer would be something like 4000-6000 lumen!
How much light is used to power a lightbulb with a solar panel?
48,000 gigawatts
How does solar panels light work?
It is a kind of solar light. And it may use a solar panel as power source.
Can you power a solar panel using a torch or an electrical lamp?
as long as the light is strong enough to heat the solar panel up
How many watts equal 35 lumen's?
There is no direct conversion for this, because these are two separate things. Watts is actual power usage. "Lumens" is how much light is provided from a specified amount of power. The typical light bulb converts some of the electricity driven through it into light, and the rest into heat. The more efficient the light bulb, the less power per lumen will be required.That is why newer bulbs can be purchased that are 13 watts and advertised as equivalent to 60 watt incandescent bulbs - the light output is roughly equivalent (lumens), but the power usage is substantially different.
How do you prove that the size of a light bulb does not matter for energy use?
What matters is the electrical power it uses in watts and the amount of light in lumens. The size of the light does not matter, whch can be proved by trying bulbs of different sizes with the same watt and lumen rating.
