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2014年9月1日星期一

How to Use Red Light Therapy

There are many ways in which light is used to affect the human body, from strobe lights to tanning beds. It can also be used to heal. One of the more recent developments in light treatments is red light therapy. Originally developed by NASA in the 1950s, the public can now benefit from this therapy as well, for a range of conditions. For instance, the University of California's "Dermatology Journal Online" reports benefits in the treatment of acne.

Instructions
1
Choose your red light therapy device. They range in size from lipstick-shaped hand-held lights to large, tabletop lamps. The former are for targeting skin conditions such as acne and cold sores, while the latter tend to be for muscle complaints. Ensure that the device is FDA-approved.

2
Remove any makeup or other skin products before using red light therapy. Do not leave any products on your skin. (You can moisturize after the treatment is complete.)

3.Place the light source over the affected area. The small, hand-held devices come with a filter so that you can place the device on your skin. Hold the larger devices a couple of inches from the skin. For instance, hold larger hand-held devices intended to relieve muscle pain in the legs away from the skin and move up and down the legs, a little like a metal-detection baton at the airport. For larger areas, the sufferer may sit in front of a table-top device with several light sources or lie under a long light source.

4
Apply the red light therapy for a duration applicable to the ailment. Small devices for facial skin complaints are typically deployed for 1 minute three times a day. For other treatments, such as for muscle pain, a common duration would be a daily dose of two 5-minute sessions, with a break of 3 minutes in between.

5
Understand how the red light therapy works. Red light has the longest light waves of any colored light. This means it penetrates deeper into the skin. As such, you will feel a slight warming of the skin that is being treated.

Tips & Warnings
Be aware that red light therapy does not offer immediate resolution. However, with regular treatments, users should see improvements after 30 days or so.

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How to Use an LED With a 9 Volt Battery

LEDs are light-emitting diodes. They are specifically created to emit light, whether visible, infrared or near infrared. LEDs are polarized, which means that the way they are placed inside circuits is important. They are categorized by factors such as their color, intensity, size, voltage and viewing angle. They are sensitive to current, and so must be used in series with a resistor to prevent their self-destruction. To calculate the value of the resistor needed with a 9-volt battery, use Ohm's Law. Ohm's Law is a formula where the resistance R is equal to the voltage V divided by the current I.

Instructions
Instructions

1
Obtain the values for the LED voltage and maximum current. This may be done by reading them off of the LED datasheet or package.

2
Study Ohm's Law to calculate the minimum value for a current limiting resistor for an LED. It is R = (Voltage Source -- LED Voltage)/LED current.

3.Calculate the minimum value of the required resistance. For example, given a 9-volt battery, and a 2-volt LED with a maximum current of 30 mA, the required resistance R is (9 V -- 2 V)/0.03 A = 233 ohms. Note that milliamps must be converted to amps by dividing by 1000. Also, the absolute minimum R should be avoided; use a 240-ohm, 330-ohm or higher valued resistor instead.

4
Wire the 2-volt LED or another low-voltage one in series with a resistor and battery. First, attach the positive side of the battery to the breadboard, and connect one end of the resistor to this side. Connect the positive side of the LED to the free end of the resistor. Place the negative terminal of the LED to ground, and then also wire the negative side of the battery to ground. The LED will light.

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How to Use an LED to Kill Bacteria

LED lights, or light emitting diodes, can be used to kill bacteria. Many studies have been done proving the effectiveness of LED lights to kill bacteria and treat acne, mouth sores from chemotherapy and diabetic wounds. The light from LEDs benefit those with continuing problems, like acne treatments.

Instructions
1
Research the various LED products that are on the market for your particular need. Some LED lights that are used to kill bacteria are very small and cover only a small area; they are very effective when treating one small wound area like mouth sores. Other LED lights used to kill bacteria cover a larger area and are effective in treating the whole face with acne.

2
Buy the right type of LED lights to kill bacteria. LED lights need to be exceedingly bright in order to kill bacteria, so make sure you buy the bacteria killing light from a reputable dealer with a good reputation. Red LED and blue LED will both kill bacteria, but the best kind of LED light to buy is one that combines red and blue LED light.

3
Use the LED light according to directions. Every manufacturer of LED bacteria killing lights has specific directions, based on the type and intensity of the LED light they use. The higher the intensity of the light, the less time is necessary to kill bacteria. Some LED light kits need only be used twice a week to kill bacteria, while others need to be used daily.

Tips & Warnings
Always protect your eyes when using LED bacteria killing light.

Never use the LED light longer than the manufacturer suggests, you can irritate the skin and make the condition worse.

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How to Buy Dimmable LED Bulbs

Light-Emitting Diode (LED) bulbs are a relatively new technology in the lighting industry. They are considered a green technology, and require much less energy than traditional types of bulbs. One of the main criticisms of these bulbs to this point has been their poor compatibility with dimmer switches. While virtually any LED bulb can be used in most dimmable fixtures, the basic technology behind these bulbs leads to poor control over light levels. Fortunately, the newest LED bulbs are completely dimmable, and offer much more versatility than older models.

Instructions
1
Understand the limitations of LED bulbs. The traditional LED light bulb is not designed for dimming. When placed in a dimmable fixture, the bulb will have some dimming capabilities, which will generally perform best in the upper and lower 10 percent of light levels. If you want to enjoy the benefits of an LED, and only require a limited dimming range (for example, the light is either at full or near full brightness, or it is at minimum brightness, with no options in between), then any LED bulb will work.

2
Explore the U.S. Energy Star Lighting Partners (see Resources for a link). This list contains LED bulb and fixture manufacturers that have been certified to meet Energy Star standards. As part of these standards, all LED fixtures offered by these partners must be dimmable. Each of these manufacturers also offers appropriate bulbs to maximize dimming range while minimizing energy consumption.

3.Review the bulbs offered by Earth LED (see Resources). This company was the first to offer a complete line of LED bulbs that are fully dimmable. Their line of Lumi Select bulbs can be dimmed from 100 percent to zero and may also be set at any value in between.

4
Choose the correct LED bulb base type. For example, the traditional incandescent light bulb used in most home applications has a standard size base known as a "Type A base." Bulbs used in ceiling fans, lamps, or flood lights may have bases of many different sizes and shapes. When making your purchase, be sure to specify the appropriate base design. For more information on this topic, review the Lumi Select website found in the Resources section.

5
Compare brightness levels carefully. Many homeowners are accustomed to buying bulbs based on wattages. Because of the difference in light output between LEDs and other types of bulbs, LED bulbs should be purchased based on their light output, measured in lumens. This is an important consideration when purchasing these bulbs, as a 9 watt LED bulb can produce the same light levels as a 70 watt incandescent.

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How to Educate a Technician to Install LED Lights

The performance of a well-trained technician can be appreciated by his clients. When his clients call upon him, he is expected to thoroughly fix their problem. Educating a technician on how to install LED lights may be a challenge at first, but once understanding is established the technician will have little problem installing LED lights.

Instructions
1
Inform the technician that the first step in installing LED light involves drilling holes into the vehicle's body away from extreme heat and moving components. Such heat can damage the LED light by increasing its current flow. This preventive step involves marking the proper drilling and mounting location, usually above the headlight housing. In addition, drilling above the headlight housing allows the technician to avoid other significant damage to electrical lines, fuel lines, brake lines and exhaust systems (Reference 1).

2
Have the technician test the headlight housing needed for mounting the LED light tubes. A good idea is to completely remove the headlight housing and install the brackets for mounting first (Reference 2). After this the technician must drill with accuracy, penetrating straight down and quickly out. The hole should be no wider than necessary. A wide or crooked hole will allow moisture or dust to eventually enter the headlight housing. Apply a bit of silicon sealer to the holes to prevent rust.

3.Show the technician how to locate the automobile's fuse box underneath the hood. Once this is accomplished the technician should access and insert the LED's red power wire in the headlight nearest to the fuse box (Reference 2). The headlight furthest away from the fuse box should be in sync with the illuminating diode with ground connector. Continue installation by inserting one of the LED wires and grommet. Pull up on the wires in order to position the LED near its entrance hole. However, the wire should not be visible. In many states there is a law against this.

4
Show the technician how to connect ground so that a sufficient source of power can be accessed later (Reference 2). Ground components can consist of a quality, medium-sized bolt with a metal ground blade underneath. This mechanism should not be excessively tight, otherwise it could crack or break apart. A ground connector is very significant. Without it, very high current can damage the LED lights.

5
Have the technician strip insulation from the end of the LED light's red power wire up to approximately 1/8 or 1/4 inch (Reference 2). Have him probe the head light with the red wire, contacting one of the two small metal tabs until the LED lights come on. These tabs can be found atop each fuse. Once power is discovered the technician can remove the fuse.

6
Direct the technician to insert the stripped wire into one of the two slots once occupied by the fuse. The appropriate slot should result in the illumination of the LED light while the other slot should not produce a similar result (Reference 2). The fuse should be reinserted after this to keep the power wire from moving. The LED light should be fully illuminated. The second LED should be installed in the same manner as the first. Insert it into the headlight housing along with a push plug. This finishes the installation process.

Tips & Warnings
When training a technician to install LED lights, encourage him to thoroughly read the installation instructions. This will cause him to become more grounded as well as confident (Reference 2). Having prior knowledge before performing an installation job makes following direction much easier and saves the trainer and trainee valuable time. Installing LED lights is not as difficult as it sounds. All it takes is a little patience while acquiring knowledge and experience.

To avoid injury and damage to the technician, he should disconnect the negative battery cable. Read the vehicle's service manual to learn more about the automobile's electronic system (Reference 2). Disconnecting the entire battery can cause the electronic system to malfunction on some modern cars. Therefore, it is wise to only disconnect the negative battery cable instead the entire battery.

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How to Make an LED Lightbulb Glow With Vinegar

How to Make an LED Lightbulb Glow With Vinegar

All vinegar, regardless of the grade or flavorings, contains acetic acid. Food grade vinegar generally contains five percent acid. This amount is weak enough to be considered safe for consumption, but strong enough to be used to power small items, such as a watch battery or LED bulb. When combined with the right materials, it's possible to produce a small, makeshift battery in a matter of minutes.

Instructions
1
Pour ? cup of vinegar into a bowl. Add 2 tsp. of salt and stir until the salt dissolves. If all of the salt does not dissolve, add a little more vinegar.

2
Cut five pieces of aluminum foil and five pieces of blotter paper to the same size as a US quarter. Blotter paper can be found at art stores and some beauty supply stores.

3.Put the five pieces of aluminum foil, the five pieces of blotter paper and five US quarters in the vinegar solution. Allow the materials to soak for at least five minutes so they can soak up the acid from the vinegar.

4
Lay one of the quarters down on a flat surface. Place a sheet of the blotter paper on top of the quarter, followed by a sheet of the aluminum foil. These three pieces make a single battery cell. Continue this stacking pattern until all of the materials are stacked up, which makes five complete cells. Five cells produces just enough energy to illuminate the LED.

5
Hold the positive lead of an LED bulb against the positive side of the battery -- the bottom quarter. Hold the negative lead against the negative side of the battery -- the top piece of aluminum foil. The LED should instantly light up upon contact with the vinegar batteries.

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StreetGlow LED Pod Light Installation

StreetGlow produces a number of aftermarket neon and LED light kits to give your vehicle a custom look. The StreetGlow LED pod light kit is an especially inexpensive way to customize specific areas of your car or motorcycle in less than two minutes. The installation is designed to be quick and easy, with snap mount bases that use adhesive backing. This makes it easy to put your LED pod under a motorcycle gas tank or under the seats of your car.

Instructions
1
Clean the area where you want to mount the LED pod. Dip the sponge in soapy water and thoroughly wash the area to remove any dirt, oil or other debris that may diminish the effectiveness of the pod adhesive. Dry the area with a clean rag.

2
Insert a flat head screwdriver into the area between the bezel and the LED pod. Pry the pod out of the snap mount base.

3.Remove the protective covering from the adhesive side of the snap mount base. Stick the snap mount base in the area you prepared earlier.

4
Line up the mounting tabs on the LED pod with the tabs on the base. Snap the pod into place to complete the installation.

5
Consult your vehicle's wiring diagram to locate a hot wire connected to the positive side of the battery and a ground wire.

6
Splice the striped wire from the LED pod into the power wire. Use the wire strippers to cut the wire. Strip approximately 1/2-inch of insulation from both sides of the cut area. Insert the exposed tips of the cut wires and the tip of the striped wire from the pod into a wire nut. Twist the wire nut clockwise to splice the wires together. Repeat this process with the ground wire in the vehicle and the black wire from the pod.

Tips & Warnings
Use the mounting screws and a power screwdriver to further secure the snap mount base if desired.

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