A hard question that 90% can not answer

This is really a hard to answer question and 90% of high school graduates do not know the question.It is about the high power flashlight. A night watchman entered into an aquarium in the middle night because he heard the noise of flipping inside. A thief or an otter? He thought and threw light with his high power flashlight .

This high power flashlight generated a parallel beam from the end side of aquarium and illuminated a fish. Now what we know are as follows:

1)Angle of the beam with respect to the horizontal base of the aquarium is θ1 = 46.0                     2）the 1000 lumen flashlight  is 40 cm away from the glass window.                                           3) Glass thickness=10 cm                                                                                                                        4) The fish inside is 50 cm from the other side.                                                                                    5) Refractive index: nwater=1.33, nglass:1.52  nair:1.00                                                          Below is a drawing to show you.

Now, the question is:What is the distance y between the fish and the bottom of the aquarium and the real position of the fish?

Environment Protection:Stop Refrigerant leakage

Leakage of refrigerant is harmful to your health and environment.As all refrigerants  are chlorofluorocarbons or CFCs,which are controlled substances and should be carefully removed and disposed.Once it leaks, it will evaporate as a gas and is harmful to inhale, causing a variety of health problems, including nausea, headache and in extreme cases asphyxiation. Also it will damage the environment and cause a lot of problems to your air conditioners or cars.

Generally when you find your air conditioner is not as cool as before or your car engine suddenly becomes hot or even smells .You may suspect a leakage occurred.

You need a mechanic for further check and action or you can do it yourself.

What you need are:

1* UV Pocket Flashlight

UV Dye

The mechanic will add UV dye to your air conditioning system and run it for several minutes. Then turn off all lights and pick out the UV pocket flashlight to check where the dye is leaking from.UV die will glow brightly under the light of UV pocket flashlight.

After carefully examine, they will take further action to stop leakage.This is a very simple way to use a pocket flashlight detecting leakage.However, it is advised to do by mechanic professionals.

Flashlight detect Alcohol: A gimmick or good invention?

In most people's mind, Flashlight mainly serves as a remote lighting or emergency kit.Their main uses are lighting for searching like pocket flashlight,outdoor activities (3000 lumen led flashlight),tactical( Best tactical flashlight) or for specialty user like LED Pen light for doctors.

However, currently, an Alcohol detector flashlight has been equipped with Penn State police in their war against drunk driving.Many officers hailed it as an effective way of detecting drunken.

Generally, this pocket flashlight  is nothing special except that it has a passive alcohol sensor.This sensor increases the capability of alcohol detection by nearly 50%. Drunk  drivers are easily identified and officers have more time for further actions.

nlike other alcohol tools,this high power flashlight does not need you to blow a tube.It can detect alcohol from your breath 5-10 inches away from your mouth.It works by quietly drawing in the driver’s exhaled breath through an in-take port. The air is pumped through a fuel cell, which generates a charge in response to alcohol vapor. If alcohol is detected, a color-coded meter on the side of the flashlight will light up. Depending on the level of alcohol detected, the light display will glow green, yellow, or red.The entire process takes around 15 seconds.

So next time ,Be careful when a police shines you with a pocket flashlight and talks with you. Simultaneously,you might been conducted an alcohol detection.

Enjoy Night hiking with 3000 lumen led flashlight

Night hiking seems to be the most popular outdoor activities and attracted more and more people participating in.According to the statistics, 34.38 million Americans join in hiking in 2013.

The reasons for night hiking are breathing fresh air, Lung exercise,with friends and family,relax after work or getting cool.However,if not well planned, there will be a lot of problems including losing way,injury, accident,lighting,discomfort, insects,etc.

So you need to well organize your hiking team and make plan before starting hiking.

1) Know well health of all members.Take necessary medicines and aid tools.

2) check your hiking way.know exactly the trail and its condition. mark clearly on a drawing map.

3) Take 3000 lumen led flashlight  in your hand. remember to fully charge the survival flashlight .

4) a hiking stick will be necessary

5) Time arrangement and shoes checking.

Now with the brightness of this 3000 lumen led flashlight,you can enjoy the leisure of night hiking.This Survival flashlight  spots clearly the way ahead and will send SOS signal in emergency.

Get this 3000 lumen led flashlight on wish to enjoy a happy night hiking with your friends.

Dentist:An LED Medical Pen light facilitates my work

You might have seen the scenario in a dentist clinic commonly.With an LED  pen light ,we carefully check patients' teeth or drill teeth.

The medical pen light used plays an important role in a dental operation.We need theLED pen light to support a direct bright beam into patients' mouth to check clearly his teeth health. Thus, a qualified medical pen light shall meet following requirements:

1) Small size and light duty 

As a dentist, usually we have tools in hands.Therefore, the Led pen light should not add burden to us.It has to be light,portable and easy hold,better to clip or mount to release our hands for work.

2) easy grip and powered

The medical pen light shall be easily grip and operated. A pen clip will help it attach to

a belt or tools. Click switch is easy to operate. Commonly found AAA battery is very 

user friendly.

3) Bright and direct beam.

Medical pen light does not need to throw far or spot large area. It has to be high intensity and bright for dentist work. 95 lumen is perfect parameter.0.55 inch diameter reflector will direct beam into places we work

This Led pen light is selling hot on Wish. We welcome your visit.

Count Chickens before hatched

This idiom" Don't count your chickens before they are hatched" might be taught to you  By your mother or old grandma.Surely it is a true discipline to guide you in Life.However,It is argumentative in science as with a flexible flashlight and skills you can count chickens before they hatch.

By egg candling,you can exactly know what and how many will be hatched. The importance og egg candling is below.

1) Separate different eggs and pick out the one you do not need. Just as the theme picture showing,you need to pick out the egg of Alligator.

2)Know the health and condition of eggs.Pick out those unfertilized or those embryos that quit growing. It is important because unfertilized eggs and quitting growing embryos will never be hatched.They will rot and cause smell and diseases.

 3) enjoy the happiness to record the growth of an embryo.

So what you need?

1) A dark room or just do it at night

2) a flexible flashlight 500 Lumens,sale on wish

Now, How to do?

1) Clean your hands and desks.

2) Turn off the lights.

3) Turn on the flexible flashlight to pick up one egg

4) Rotate eggs carefully and slowly to watch the embryo.Fast spinning may dislodge and damage the embryo.

5) Watch carefully and make a record.

6) No need to candle everyday. Candle them on the 4th,7th,11th and 16th days or near days.

Below are some charts to give you guidelines.

After carefully candling, you now need to wait patiently for chickens hatch even though You can count out them now. This useful flexible flashlight is available on Wish for you.

Neat Freak: UV Pocket Flashlight is important!!!

Most people will agree what Leah Remini said. Absolutely, it is intolerable to live in a dirty house or hotel especially in those far-flung areas. the hotels are not well managed and stains, vomits,sperms,etc were left on bed sheets or walls,which are not visible under common light. Use a pocket flashlight  with UV to check clearly before taking rest.It will be clearly appear if existing.

Surely this UV  pocket flashlight can detect pets urine too. It is necessary for you to check thoroughly your house with this  pocket flashlight every 3 days.Because pets stains will bring diseases and damage your floors and carpets. 

So do keep a UV Pocket flashlight in house.Otherwise,the cat will say it was not him again.

Be cautious!!! Scorpions under Flight seat.

Travel is a joyful thing. However,dangers many also hide especially when travelling to a new place.Scorpions stung is the most reported arachnid bite in Mexico and caused 1000 deaths annually. Also as Scorpions  like to hide under seat, bed sheet or in shoes,it is very dangerous for a traveler in hotel or even in flight.

Early in this year,it had reported that a woman had stung by scorpions on Alaska flight.

Therefore, It is necessary to find and get rid of  them before their attacks. Generally,Scorpions are hard to spot with regular pocket flashlight ,However,they can be identified clearly under the light of an UV pocket flashlight.They will glow in dark with the light illuminating by a high power flashlight. Below is a picture to show you

As some people like to keep exotic critters as pets. Most prefer scorpions and this is a danger for neighbors or family members.Thus it is important to check your bed ,seat, sheet,shoes and cabinets with a high power flashlight ,which can produce UV light. 

How to choose a good LED medical pen light for doctors and nurses?

In Last post, we have discussed and shared the reasons of doctors and nurses using LED pen light.Now,we will see how to choose a good medical pen light.

1) Small,light and sturdy
 As an Led pen light is usually used as an auxiliary lighting, where main lights  are not able to be used.In that case, Doctors usually need to hand the medical pen light.Thus ,it has to be small in size and light in weight. Also as doctors may use them frequently and sometimes need to do swinging test.Therefore, the Led pen light has to be sturdy and easy clipping in pocket from falling off.

2) Bright enough but no harm

An Led pen light has to be bright enough because sometimes you need to enough illumination for checking and test. While it should not be so high bright like our 1000 lumen led flashlight or 3000 lumen led flashlight.Around 100 lumen will be enough. Also it should not be harmful. Hence,The CRI of a medical pen light will be warm white.High power flashlight will cause temporarily or permanent blind.

3) easily powered and operated

An Led pen light shall use commonly found batteries like AAA or AA.Also,it has to be easily operated. Low to high or low-middle-high is enough. No need for strobe,SOS,etc.A click switch will be perfect design for a medical pen light.

Besides,if possible please select LED Pen light with an orange peel reflector as it will disperse light by somewhat to protect your eyes better. 

Now,you may ask

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