Which shade # lens gives the most protection for welding: 8, 6, 4, or 10?

When it comes to welding, the selection of lens shade is critical for protecting the eyes from intense light and harmful radiation. The shade numbers correspond to the darkness of the lens, with higher numbers indicating darker lenses that provide greater protection against UV and infrared radiation, as well as the bright light emitted during welding.

A shade #10 lens is considered to provide the most protection among the options listed. This higher shade level is appropriate for the most intense types of welding processes, such as those involving high currents or when working with materials that produce more intense light. It effectively reduces glare and shields the welder’s eyes from harmful exposure.

In contrast, lower shade numbers like #8, #6, or #4 allow more light to pass through and are typically used for lighter welding operations where less protection is necessary. These shades may not adequately protect the welder's eyes during activities that produce a more powerful light output, making #10 the safest and most effective choice for maximum eye protection.