The amount of light compared to darkness that a plant recieves.
Length of day (or length of period artificial light is provided).
Time period when light is present.
The total number of hours of daylight.
The number of hours of light in a 24-hour period.
Period of light and dark to simulate the natural day and night cycle, important for the health and well being of animals in captivity
The length of the â€œlightâ€ portion of a day. It varies with the natural day length, but is often supplemented with high intensity electric lights when growing plants.
Length of the period of daylight each day.
The length of time per day that an animal is exposed to natural or artificial light.
The length of time that light is present in a given time interval, such as a daily 24-hour time interval.
The number of consecutive hours of light in a day.
(foe´ tow peer´ ee ud) • The duration of a period of light, such as the length of time in a 24-hour cycle in which daylight is present. The regulation of processes such as flowering by the changing length of day (or of night) is known as photoperiodism.
the amount of time per day that an organism is exposed to light (Morris 1992).
The length of time that the aquarium lights are on.
The period of daily illumination which an organism receives.
The relative length of daylight to darkness. When days become increasingly short in autumn, it appears to stimulate hummingbirds to migrate south for the winter. Lengthening days in spring appear to be the cue to return to the breeding grounds.
the light/dark or day/night cycle.
Refers to the number of consecutive hours that light occurs in a day. In the aquarium, it is the number of hours that the lights are kept on.
a recurring cycle of light and dark periods in which the period length may vary.
the relationship between the length of light and dark in a 24 hour period
The period of light from dark.
The relative periods of light and dark periods within a 24-period. Also referred to as daylength.
the number of daylight hours best suited to the growth and maturation of an organism.
day length, day light length
Refers to the number of sequential hours that light and dark are applied to an aquarium. An attempt should be made to simulate an organism's prefered photoperiod. Increasing the photoperiod is not a substitute for improper light quality (spectrum) or intensity.
the period each day of daylight; daylength.
The duration of an organism's daily exposure to light.
Duration of light, usually expressed in hours, within a 24-hour day
The length of time that the aquarium lights remain on.
Day/night cycle of light/dark
The relative hours of light and darkness in a 24-hour period. Some plants respond to a change in day length (photoperiod) in order to grow or flower.
The duration of the daylight period.
The duration of light in a light/dark cycle.
Day length or duration of daily exposure to light and dark periods, either natural or artificially manipulated.
Foh-toh-PEER-ee-odd) The quantity of hours in a day [D] or night [N] is the photoperiod â€” measuring daylength photoperiod is the standard by default. The length of this has bearing on the lives of insect, plants, animals, even people. Moreso on the bugs, though.
Based on the amount of sunlight in the day, animals begin to produce hormones to get ready for breeding.