Energy-efficient window attachments are important for both new and existing homes. About 30% of a home's heating energy is lost through windows. In cooling seasons, about 76% of sunlight that falls on standard double-pane windows enters to become heat. Window coverings can help with this loss of energy by providing comfort, regulating temperatures, and lowering energy bills. The exact savings will depend on the type of attachment, the season, the climate, and how the attachment is used. In addition to the window coverings, storm windows with low-e coatings and/or multi-layer glazing are effective at improving thermal performance of windows and reducing solar heat gain.

These shades typically fit inside of the window casing, or just outside, and they come in a variety of fabrics, colors, and weaves. Heavier fabrics will typically offer slightly better thermal performance, but roller and roman shades offer only a small amount of insulation and are most effective for privacy, room darkening, and blocking sunlight.


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When completely closed and lowered on a sunny window, highly reflective blinds can reduce heat gain. Horizontal slat-type blinds can also be adjusted to block and reflect direct sunlight onto a light-colored ceiling. A light-colored ceiling will diffuse the light without much glare, while allowing you to take additional advantage of natural daylighting.

In the past, most awnings were made of metal or canvas, which need to be re-covered every five to seven years. Today, awnings are made from synthetic fabrics such as acrylic and polyvinyl laminates that are water-repellent and treated to resist mildew and fading. Whatever the fabric, you should choose one that is opaque and tightly woven. A light-colored awning will reflect more sunlight.

The differences in reflectivness (albedo) and solar illumination at different latitudes lead to net heating imbalances throughout the Earth system. At any place on Earth, the net heating is the difference between the amount of incoming sunlight and the amount heat radiated by the Earth back to space (for more on this energy exchange see Page 4). In the tropics there is a net energy surplus because the amount of sunlight absorbed is larger than the amount of heat radiated. In the polar regions, however, there is an annual energy deficit because the amount of heat radiated to space is larger than the amount of absorbed sunlight.

This map of net radiation (incoming sunlight minus reflected light and outgoing heat) shows global energy imbalances in September 2008, the month of an equinox. Areas around the equator absorbed about 200 watts per square meter more on average (orange and red) than they reflected or radiated. Areas near the poles reflected and/or radiated about 200 more watts per square meter (green and blue) than they absorbed. Mid-latitudes were roughly in balance. (NASA map by Robert Simmon, based on CERES data.)

When you go outside, even with protective sunglasses, do you find the brightness brings on head pain or otherwise makes you feel bad? Do your eyes feel sensitive to the light, causing you to squint or turn away? The fact is: if bright sunlight gives you a headache, you may actually be experiencing a light-sensitive migraine attack.

Make sure heat exhaustion or something more serious is not causing your head pain. As dehydration is also cited as a common migraine trigger, you want to drink plenty of water especially if you are outside for an extended period of time. It might also be worth investing in ice packs or cooling vests to regulate your body temperature during hotter periods. While they won't remove the sensitivity to sunlight, these simple tips will keep it from getting worse.

Numerous studies have shown that treating the underlying condition will help alleviate many of the corresponding symptoms. Taking your migraine medication, especially in the early stages of an attack, can often keep the sunlight, your headaches and other issues at bay.

Polymorphous light eruption is a rash that affects parts of the body that are exposed to more sunlight as daylight hours get longer, such as the front of the neck and chest. Polymorphous means that the rash can have many forms, such as tiny bumps, raised areas or blisters.

Causes of sun allergy include immune system reactions to sunlight, certain medications and chemicals that make the skin more sensitive to the sun. It isn't clear why some people have a sun allergy and others don't. Inherited traits may play a role.

Plants rely on the energy in sunlight to produce the nutrients they need. But sometimes they absorb more energy than they can use, and that excess can damage critical proteins. To protect themselves, they convert the excess energy into heat and send it back out. Under some conditions, they may reject as much as 70 percent of all the solar energy they absorb.

Across from their north-facing counterparts, south-facing windows get the most direct sunlight during the late morning and early afternoon. While the sun rays will be strongest during these hours, direct sunlight will continue throughout the day. High-light houseplants are usually best for these windows. Medium-light plants can thrive near south-facing windows with appropriate protection from furniture, curtains, or other plants.

East-facing windows get the first rays of bright sunlight in the morning. However, their direct sunlight will wane at noon when the sun is perfectly overhead. East-facing windows still provide a good amount of sunlight and heat without being too unbearable. Medium-light plants are the best option for east-facing windows.

West-facing windows gather the most direct sunlight in the late afternoon until the sun sets in the evening. Plants placed near a west-facing window will also benefit from getting their light during the warmest part of the day. While this can cause some plants to burn, high-light plants will thrive in a west-facing window. Medium-light plants can also grow well with appropriate cover.

Sunlight helps boost a chemical in your brain called serotonin, and that can give you more energy and help keep you calm, positive, and focused. Doctors sometimes treat seasonal affective disorder (SAD) and other types of depression linked to low levels of serotonin with natural or artificial light.

NY-Sun, a dynamic public-private partnership, will drive growth in the solar industry and make solar technology more affordable for all New Yorkers. NY-Sun brings together and expands existing programs administered by NYSERDA, Long Island Power Authority (LIPA), PSEG Long Island, and the New York Power Authority (NYPA), to ensure a coordinated, well-supported solar energy expansion plan and a transition to a sustainable, self-sufficient solar industry.

Dr. Bligard says there are many benefits from sunlight, including being a free mood enhancer. Being in the sun can make people feel better and have more energy. Sunlight increases the levels of serotonin in the brain, which is associated with improved mood. Not surprisingly, serotonin levels are highest in the summer.

Trees will grow their branches in the direction that receives the most sun. This means that trees will have more branches on the south facing side since it is exposed to the most sunlight throughout the day.

After you check for moss, look around the base of some trees for ant hills. Ants will build their colonies so that they are exposed to the most sunlight, which is normally facing south. The exposure to sunlight provides them with more heat and better insulation for their underground colony.

Moreover, eating mushrooms packed with vitamin D2 confers many other health benefits. Mushrooms have many helpful nutrients, including beta glucans for immune enhancement, ergothioneines for antioxidative potentiation, nerve growth stimulators for helping brain function, and antimicrobial compounds for limiting viruses. I will write more about these in future issues of the Huffington Post.

How much vitamin D can 100 grams of fresh mushrooms make from sunlight? A lot, but a lot more when mushrooms are dried, pulverized, and then exposed to UVB light lamps. Caution: Using UVB light lamps can cause damage to your eyes and skin. Do not attempt this without taking necessary precautions.

These results make sense. When mushrooms were sliced, more ergosterol-rich surface area was exposed. The indoor UV light was more intense than sunlight. The combination of these resulted in more vitamin D being produced. Although up to 12 hours of sun exposure to upside-down (gills up) shiitakes created 46,000 IU of vitamin D, I am sure sliced ones would give you more, as the surface area would increase. However, the sun is a convenient source of UVB whereas setting up a UVB light chamber is not.

1) Obtain fresh Organic shiitake, maitake, button, oyster, shimeji or other mushrooms. 

2) On a sunny day in June, July or August, slice the fresh mushrooms. Place them evenly on a tray exposed directly to the sun from 10 am to 4 pm. 

3) Before nightfall, cover the mushrooms with a layer of cardboard to block moisture from dewfall. 

4) The next clear day repeat exposure to the sun from 10 am to 4 pm. 

5) Remove the mushrooms and finish drying (if necessary in a food dehydrator until they are crispy). 

6) When thoroughly dry, store in a glass jar or sealed container. Adding a tablespoon of uncooked rice as a moisture absorber will help keep the mushrooms dry. The mushrooms should be good for a year or more, depending upon conditions. 

7) Take 10 grams daily per person, about a small handful. Rehydrate in water for one hour. The mushrooms will swell. Then cook as desired.

Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon. When direct solar radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and radiant heat (Atmospheric). When blocked by clouds or reflected off other objects, sunlight is diffused. Sources estimate a global average of between 164 watts to 340 watts[1] per square meter over a 24-hour day;[2] this figure is estimated by NASA to be about a quarter of Earth's average total solar irradiance. 17dc91bb1f

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