A grow light or plant light is an artificial light source, generally an electric light, designed to stimulate plant growth by emitting an electromagnetic spectrum appropriate for photosynthesis. Grow lights are used in applications where there is either no naturally occurring light, or where supplemental light is required. For example, in the winter months when the available hours of daylight may be insufficient for the desired plant growth, grow lights are used to extend the amount of time the plants receive light.
Grow lights either attempt to provide a light spectrum similar to that of the sun, or to provide a spectrum that is more tailored to the needs of the plants being cultivated. Outdoor conditions are mimicked with varying colour temperatures and spectral outputs from the grow light, as well as varying the lumen output (intensity) of the lamps. Depending on the type of plant being cultivated, the stage of cultivation (e.g., the germination/vegetative phase or the flowering/fruiting phase), and the photoperiod required by the plants, specific ranges of spectrum, luminous efficacy and colour temperature are desirable for use with specific plants and time periods.
Read more about Grow Light: Typical Usage, Light Spectra Used, Light Sources, Light Requirements of Plants
Famous quotes containing the words grow and/or light:
“Many a poor sore-eyed student that I have heard of would grow faster, both intellectually and physically, if, instead of sitting up so very late, he honestly slumbered a fools allowance.”
—Henry David Thoreau (18171862)
“O he did whistle and she did sing,
And all the bells on earth did ring
For joy our Saviour Christ was born
On Christmas Day in the morning.”
—Unknown. As I Sat on a Sunny Bank. . .
Oxford Book of Light Verse, The. W. H. Auden, ed. (1938)