Disregarding the effects of atmospheric refraction . . .
If you're standing at the north pole, then the sun is up in your sky from March 21 to September 21,
and below your horizon from September 21 until March 21.
The purpose of a happy light is to boost your mood, specifically during the winter or when working longer hours. This is accomplished by natural spectrum light that is similar to daylight.
Yes, poinsettia plants need plenty of indirect sunlight to thrive. Place them near a window where they can receive at least six hours of light each day. Avoid direct sunlight, as it can cause the leaves to burn.
To encourage poinsettia plants to turn red, you need to provide them with specific light conditions. Starting in late September, place the plants in complete darkness for at least 14 hours a day, ensuring they receive bright, indirect light during the remaining hours. This darkness triggers the plant's natural response to produce the red bracts. Continue this routine for about 6-8 weeks until the desired color develops.
No. Lighthouses are not lit in daylight hours, because a lighthouse light is like a giant magnifying glass made up of usually hundreds of prisms. If the light was on in daylight hours the magnified beam of light is capable of focusing the sunlight just like you can do with a hand-held magnifying glass. This laser beam of light could easily ignite dry vegetation as the light sweeps over the land.
You don't need any light at all you can put it in your closet and it will grow just fine. You also don't even need to water it because it absorbs the water vapor in the air and turns it into nutrients so that the plant can grow healthy, tall and green.
sunlight
Leave the light on during daylight hours, and turn it off at nightime.
No. There are places on the Antarctic continent when there are 24 hours of sunlight -- but during the summer.
Europe
Europe
The region of the world where it is light 24 hours a day is the Arctic Circle during the summer months.
depends on where u live, equator has 12 hours of light, but the true is that generally the same amount of time.
161,487
No. The hours of darkness and day light are equal during autumnal equinox. (Both 12 hours)
im not sure
im not sure
There is no definitive answer to this question, but during the winter it is light for 1-2 hours per day and during the summer it is almost always light.