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There is no fixed relationship between the brightness (lumens / candela) of a light source, and its power consumption (watts). Incandescent bulbs have a low luminous output for their power consumption, Compact Fluorescent Lamps are intermediate, and LED's are the most efficient in today's world.
2000-3200 depending on design for the old T12. You may not realize it but this is a trick question. It even means money in your pocket; here is why.
There are several levels or types of fluorescent bulbs. Many are familiar with the T12, they are the older type about 1.5 inches in diameter. T12s are now being phased out by law because they are less energy efficient. They use about 1 watt to produce 50 Lumens. The newer T8 use 1 watt to produce about 90 Lumens.
Fluorescent bulbs come in various wattage, and efficiencies. The wattage is most often right on the bulb, if you're confused just enter the numbers into your search engine and it should give the details for each variation. The bulb make up changes energy efficiency and so does the ballast or electronics. The older ballast give off noticeable heat, and so some of that electricity does not become light. Improving electronics have less heat loss to make the same amount of light.
The incandescent light for most of us can provide a comparison, we know about how bright an old 100 watt light is, it produces 1750 Lumens or about 17.5 Lumens per watt. So you can see that the old Fluorescent would still be much more energy efficient at 50 to 1. The T8 are even more energy savings at 90 to 1 (better than most CFLs at average of 60 to 1) LEDs depending on the design can range from 50 to 1 to about 120 to 1, but they do get more expensive as efficiency increases.
When considering lighting, don't be fooled by the hype, just look on the description find the Lumens then divide by the watts, it should be 50 or above to be called energy saving. The cost of the bulb is less important than the cost of the energy.
All of this means huge differences in costs to run. As a lighting efficiency expert I think it is easiest to compare the cost to run over a year. This makes thousands, even millions of dollars of difference for companies using a lot of lighting. Even a modest homeowner may save hundreds of dollars a year with a little thoughtfulness on lighting.
Now there is a T5 tube (5/8 inch) just coming on the market that has my favor, one has an efficiency of 1 watt to 186 Lumens! I did calculations on a fellows lighting just to light his garage (24hrs a day) The way he was doing it cost him $1100. The super high efficiency T5 would cost under $50. a year for power.
Energy efficiency means money in your pocket, less CO2, and if most of use take heed, even fewer power companies needed. I keep telling people that this makes a world of difference, and it can be as simple as changing a bulb!
Light from any source (natural or artificial) travels until it is dispersed by the atmosphere. There are cases in which a single candle can be seen from a mile away by a human eye.
A 40-watt bulb might produce around 30 candelas. The amount of light at a distant point is inversely proportional to the square of the distance. So it might be possible to see a 40 watt bulb at 5.48 miles (the square root of 30).
Of course, the light itself "keeps going", although it may take specialized instruments to detect it.
40 Watts! Perhaps a better question would be how many lumens does a 40 watt tubelight emit, versus an 40 watt incandescent.
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How many lumen's are in a 36 watt T8 fluorescent tube?
2300lm Comment I think you mean lumens, not lumen's. No that answer is wrong Watts (energy usage) / Lumens (light output) 25 is equal to 200 35 is equal to 325 40 is equal to 450 60 is equal to 800 75 is equal to 1100 100 is equal to 1600 125 is equal to 2000 150 is equal to 2600 36 watts would be about 350 Lumens
Why ordinary bulb has short life?
Because an 'ordinary' bulb has a metal filament which glows through resisting the electricity flowing through it. This eventually weakens the filament and it breaks. The 'energy-saver' bulbs are basically miniature fluorescent tubes - these have electrodes at either end of the tube which generate electricity, this 'excites' the molecules of the fluorescent coating - producing light. They only fail when there's no more coating inside the tube - which means they last MUCH longer !
What types of capacitors are used in fluorescent tube starters?
electrostatic capacitor
How will you test starter and choke in fluorescent tube?
You can use a wire instead of the starter to test the tubes .. I did it, it works !
How choke coil limit current to the fluorescent tube?
A choke coil, also known as a ballast, limits the current to a fluorescent tube by providing a high impedance to the flow of current. This high impedance restricts the current flowing through the tube, allowing it to operate within its required current range. The choke coil also helps regulate the starting voltage and stabilize the operation of the tube.
Which among the following is most energy efficient incandescent build fluorescent tube compact fluorescent light bulb halogen bulb?
The most energy-efficient option among the ones listed is the compact fluorescent light bulb (CFL). It uses about 75% less energy than incandescent bulbs, lasts longer, and produces less heat. Halogen bulbs are more efficient than incandescent ones but are less so compared to CFLs.
How many volts should I be reading at a fluorescent bulb?
The voltage present on the secondary side of the ballast (transformer) varies as to the type of fluorescent tube or bulb that is in the fixture. The voltage will always be higher that the applied line voltage that supplies the ballast.If the fluorescent bulb screws into a lamp type of fixture, then there is no way to measure the voltage at the bulb as the tube and ballast are a combined sealed unit.
How many lumens does an 18 watt CFL give off?
Currently maximum LED luminous efficiency is about 114 lumens/W, measured at 50mA. Average luminous efficiency is about 104 lumens/W. Ordinary LED light effect is about 60 lumens / W. 18W is about 130 lumens is about 1080 lumens.
When should you replace a fluorescent light bulb?
when the tube ends blacken after failure of the tube heaters
What is the lumen out put per 4 foot fluorescent T-12 light tube?
A typical 4-foot fluorescent T-12 light tube produces around 2,300 to 2,600 lumens of light output.
How much is a fluorescent light bulb?
A four foot tube is about $4.95.
How many lumens in a 18 Watts halogen lamp?
a 18watt plc fluorescent tube renders 1800lux
How many watts fluorescent tube?
The answer is 40 watts, power is a rate of energy. If you are looking for the total amount of energy it uses over its life, take its expected life and multiply it by 40 watts, which will give you your watt-hours. For example Expected life of the bulb is 2000 hrs Then it would be 2000*40 = 80,000 watt - hours or 80 KW-Hours Power companys charge by the KW hour used
How many lumen's are in a 36 watt T8 fluorescent tube?
2300lm Comment I think you mean lumens, not lumen's. No that answer is wrong Watts (energy usage) / Lumens (light output) 25 is equal to 200 35 is equal to 325 40 is equal to 450 60 is equal to 800 75 is equal to 1100 100 is equal to 1600 125 is equal to 2000 150 is equal to 2600 36 watts would be about 350 Lumens
How many lumens in an F10T5 830 tube?
An F10T5 830 tube typically produces around 300-400 lumens. This may vary slightly depending on the specific brand and quality of the tube.
what is the long thin light bulb called?
The long thin light bulb is called a fluorescent tube or a fluorescent light bulb. It is commonly used in commercial buildings, offices, and schools for general lighting purposes.
Which is hotter a fluorescent light tube or a light bulb?
By far the hottest of the two light sources is the light bulb.
