Eyes are very important part of our body and they are very sensitive too. They need protection in daily life and that is the reason sunglasses are part of our everyday life and an essential fashion accessory too. On the other hand, when it comes to the profession like welding, the eye protection is very important. The intense light and heat is generated during welding, which is not safe for the naked eye. http://weldingclassesnearme.com/equipment/best-auto-darkening-welding-helmets/ are used for this purpose.
The sole purpose of a welding helmets is to protect your eyes from every kind of danger, which can cause damage to your eyes. It can be intense heat, or it can be the light spark. Sometime, we wear helmet to protect our eyes against the UV and IR radiations.
The number of lens shade is very important. Many people think that high number means more protection, but it is not the case. High number indicates the darkness of the lens. If the number is near 10, it means the lens is quite dark as compared to the lens which is number 4. So, you need to select the number of lese according to the level of your comfort. You can try different numbers, when you can see the place of working, but at the same time it provides enough protection too. So, the number of lens should be somewhere in the middle, around 10. More higher number will make it difficult for you to see the working place and lighter number might not provide the enough protection. So, make sure that you are selecting the proper number of lens, when you buy welding helmets.
You can choose battery power welding helmet, but now a day solar power helmets are also available. Similarly, you can also choose between fixed shade helmets and variable helmets.