"lumen" is correct and usable in written English.
It is a noun derived from the Latin word "lumen," meaning "light." You can use the word to refer to a unit of luminous flux, or the total amount of visible light emitted by a light source. For example, "This LED light produces 600 lumens of light."
Another type of light, lumen, then radiated back, sweeping up, compressing and purifying any "imperfect" matter in its wake.
The number of lumens per watt (lm/W) measures a light's efficiency, while the number of dollars per lumen measures its cost.
To compete with the light output of a single 60-watt incandescent bulb that emits about 800 lumens (a measure of light power as perceived by the human eye), companies such as LED Lighting Fixtures and Permlight of Southern California are designing lamps based on clusters of white LEDs that achieve a similar lumen output, but consume a fraction of the power.
That is a market worth $12 billion around the world, according to Robert Steele, an analyst with Strategies Unlimited in Mountain View, California.A light is judged by the number of lumens it throws (a lumen is a measure of brightness that accounts for the sensitivity of the human eye).
By now the lumen was so weak it could no longer purify matter, which left the imperfect Earth, its four elements and atmosphere.
Tubular, or merocrine, glands extrude their secretion into a central lumen.
If a lumen appears later within such a body, the result may be the same as that achieved by folding that is, a tube or vesicle may be formed.
Their secretory cells surround a central space, or lumen, into which the secretion is extruded.
Obstruction due to scarring in the area of the gastric outlet, or to tumours encroaching on the lumen, causes the stomach to fill up with its own secretions as well as with partially digested food.
Endoderm completely surrounds the lumen of the archenteron (when present) and produces the cavity of the alimentary canal.
As a consequence of the infolding at the vegetal pole, the blastocoel is reduced or obliterated, and a new cavity is created, the primitive gut cavity, or archenteron, which eventually gives rise to the hollow core (lumen) of the alimentary canal.
