How fast does a welding helmet darken?

How fast does a welding helmet darken?

Summary

One right welding helmet can do more than just protect you from these dangers. In some cases, the right helmet can help you weld better.

Switching speed is another important specification. It indicates how long it takes the lens to darken once it senses the arc. The faster the switching speed, the less fatigue on your eyeballs. In the early days of auto-darkening, lenses were on the market with speeds as low as 1/3,600 of a second. Now most auto-darkening welding helmets switch shades between 1/10,000 and 1/25,000 of a second.