Fluorescent Light Lumens Per Watt

φ v lm p w η lm w watts to lumens calculation.

Fluorescent light lumens per watt.

Lumens are the measure of total light intensity from a single source in this case a tube. An incandescent light bulb s longevity is 2 000 hours on average. While your actual use may vary the dollar amount noted will give you a good baseline. On the other hand fluorescent light bulbs provide much more lumens per watt making this type of lamp much more efficient than incandescent bulbs while providing a comparable light output.

That s more than 4 5 times as efficient as the ge incandescent light bulb. This is based on a set rate of usage each day. Lumen maintenance the ability of a lamp to retain its light output over time. The greater the lumens the brighter or more intense the light.

In reality though most people are looking for a cheap 2 50 bulb or even less. Fluorescent lamp fixtures are more costly than incandescent lamps because they require a ballast to regulate the current through the lamp but the lower energy cost typically. Average initial new lumens out of the package for a 32 watt bulb at 3500k color temperature is 2850. Well fluorescent tubes can only produce about 50 100 lumens per watt lm w.

This is because a lot of the energy that is produced is wasted because it is transformed into heat instead of light. A 40 watt fluorescent tube for example is rated around 2300 lumens. A fluorescent light bulb s longevity is significantly higher from 6000 to 15000. Measured in lumens per watt lpw system efficacy is the ratio of the light output in lumens to the active power in watts.

Luminous efficacy is a measure of how well a light source produces visible light. Led tubes remain relatively cool so the maximum amount of light can be produced while there is little to no wasteful heat produced. Energy saving lamps have high luminous efficacy more lumens per watt. The luminous flux φ v in lumens lm is equal to the power p in watts w times the luminous efficacy η in lumens per watt lm w.

To replace it with the same intensity led just look for one that rates around 2300 lumens. Greater lumen maintenance means a lamp will remain brighter longer. It is the ratio of luminous flux to power measured in lumens per watt in the international system of units si. A 40w equivalent ge spiral cfl light bulb uses 10 watts of electricity to put out 580 lumens so the energy efficiency of that light bulb is 58 lumens per watt.

Lumens to watts calculator watts to lumens calculation. This is measured in lumens on the label. Depending on context the power can be either the radiant flux of the source s output or it can be the total power electric power chemical energy or others consumed by the source.