The amount of lumens that are emitted from a fluorescent lamp is given approximately by the luminance (cd/m^2) times the length (m) times the diameter (m) times pi squared. Unfortunately, we don't usually know the luminance.
The number of lumens varies greatly from bulb to bulb, across the various types of fluorescent technologies. One rule of thumb, that won't apply to every type of fluorescent lamp, is to multiply the rated wattage by 80 (lm/W) to get the number of lumens.
If so, a 40 watt fluorescent lamp will output about 3200 lumens, but, as you will find elsewhere, on Wikipedia:-
100 W tungsten incandescent (220 V): 1380 lm
100 W tungsten incandescent (120 V): 1750 lm.
So the above information does not seem quite right for a 40 watt fluorescent bulb.
Furthermore, for the analysis to be accurate, one has to realize that light can be either focused as in a laser or dispersive as in an incandescent bulb or fluorescent tube. Lumen ratings given with a square meter to distance ratio would help a lot but are not often given.
Technical information is sometimes printed on the boxes which fluorescent tubes come in from the factory. For instance, on one box of compacts fluorescents it states that a 100 watt compact fluorescent will put out 1700 lumens. Dispersive of course. For further information see the Related links shown below.
A 42 watt CFL bulb typically produces around 2800 to 3100 lumens of light output.
Depending on the brand, it will give about 18.000 Lumens and equals a 100W HPS lamp
A CFL light bulb can save about 75% of energy compared to an incandescent bulb. This is because CFLs are more efficient in converting electricity into light, while incandescent bulbs produce more heat than light, resulting in greater energy waste.
The amount of light (Lumens) delivered by a light bulb cannot be determined by it's wattage. Bulbs of any wattage by different manufacturers can have different output (lumens). Everything else being the same, a 34 watt 110volt bulb will put out about half the light than a 34 watt 220 volt bulb, and a 12 volt one will put out about 10% of the light as the 120 volt one will.
If the question is what wattage compact fluorescent (CFL) lamp has a similar light output to an incandescent lamp of a given wattage, the ratio is usually about 4. A 60W incandescent can be replaced by an 13-15 W CFL lamp. A 60W CFL lamp can replace a 300W incandescent lamp.
A 42 watt CFL bulb typically produces around 2800 to 3100 lumens of light output.
Incandescent: 10-12 lumens per watt CFL: 50 lumens per watt.
Depending on the brand, it will give about 18.000 Lumens and equals a 100W HPS lamp
This is a bit less light than a 40W incandescent bulb (much less than a 9-watt CFL bulb, but twice as much as a 5-watt CFL mini-bulb).
A 150-watt light bulb uses energy at the rate of 150 watts, when it's turned on.
A 60-watt incandescent light bulb typically produces around 800-900 lumens. However, this can vary depending on the specific type and brand of the bulb. LED and CFL bulbs can provide the same amount of light output (lumens) as a 60-watt incandescent bulb while consuming less energy.
A CFL light bulb can save about 75% of energy compared to an incandescent bulb. This is because CFLs are more efficient in converting electricity into light, while incandescent bulbs produce more heat than light, resulting in greater energy waste.
It's about 600 lumens. The same brightness comes from a 12 Watt compact fluorescent light (CFL).
The amount of light (Lumens) delivered by a light bulb cannot be determined by it's wattage. Bulbs of any wattage by different manufacturers can have different output (lumens). Everything else being the same, a 34 watt 110volt bulb will put out about half the light than a 34 watt 220 volt bulb, and a 12 volt one will put out about 10% of the light as the 120 volt one will.
If the question is what wattage compact fluorescent (CFL) lamp has a similar light output to an incandescent lamp of a given wattage, the ratio is usually about 4. A 60W incandescent can be replaced by an 13-15 W CFL lamp. A 60W CFL lamp can replace a 300W incandescent lamp.
Compact fluorescent bulbs are widely used because they use one fifth of the electric power to provide the same amount of light as an incandescent bulb. Incandescent: 12 lumens per watt Halogen: 15 lumens per watt CFL: 50-60 lumens per watt LED: 100 lumens per watt High-pressure sodium: 200 lumens per watt
A 13 watt CFL bulb is roughly equivalent to an 8 watt LED bulb in terms of light output. Look for an LED bulb with around 8-9 watts and a lumens (brightness) output of approximately 800-900 lm to match the brightness of a 13 watt CFL bulb.