Q: What is the correct lens shade to use in my welding helmet to properly protect my eyes?

A: Many people mistakenly think the lens shade number corresponds to the amount of protection provided to the eyes and hence the higher the number, the better the protection. But in reality, since all helmets that comply with ANSI standards filter out a vast majority of the harmful UV and IR emissions to protect the eyes, the choice is simply a matter of comfort. The shade number just denotes the level of shading provided by that particular lens and should be used by operators as a guide to select the one that is most comfortable and yet provides good visibility for the particular application. Of course, there are some suggested lens shade numbers you can use as a guide if you are unsure what to select for your application. These correspond with the amperage being welded (see shade chart, Figure 1). Always select a shade that allows you to see the weld puddle clearly and that most aids your welding ability.