Choosing the correct welding lens shade is the single most important eye-protection decision a welder makes. Too light, and UV/IR radiation causes photokeratitis — commonly called welder's flash or arc eye — and accelerates long-term retinal damage. Too dark, and you lose visibility of the weld pool, leading to defects, poor fusion, and increased risk of injury from losing track of the puddle. This guide gives you an authoritative welding lens shade chart by amperage and process, aligned with ANSI Z87.1 and AWS Z49.1:2012, plus a comparison of passive vs. auto-darkening helmets so you can choose the right gear with confidence.
WeldingMart stocks Lincoln Electric's full helmet lineup — from passive fixed-shade lenses to professional auto-darkening helmets — across our welding helmets collection.
What Welding Lens Shade Numbers Mean
Shade numbers measure how much light — specifically UV, visible, and IR radiation — a welding lens filters out. The higher the shade number, the darker the lens and the less light passes through. Shade numbers are standardized under ANSI Z87.1 (American National Standard for Occupational and Educational Personal Eye and Face Protection Devices) and referenced in AWS Z49.1:2012 (Safety in Welding, Cutting, and Allied Processes).
Shade numbers used in welding typically run from 5 through 14:
- Shade 4–6: Oxy-fuel cutting, torch brazing, torch soldering, and grinding
- Shade 7–10: Low-amperage arc processes — light TIG, light MIG, plasma welding below 100A
- Shade 10–12: General MIG (GMAW), flux-cored (FCAW), TIG (GTAW), and mid-range stick (SMAW)
- Shade 12–14: High-amperage stick welding, heavy plasma cutting, carbon arc welding
The lens shade does not reduce total radiation to zero — it reduces it to a level safe for extended use. ANSI Z87.1 specifies minimum optical density thresholds for each shade number so that all compliant lenses at a given shade provide equivalent protection regardless of manufacturer.
Welding helmets sold in North America also use a DIN rating (Deutsches Institut für Normung), which maps 1:1 to the shade number system. DIN 11 = Shade 11. European auto-darkening helmets label shade ranges in DIN rather than shade numbers — they refer to the same standard.
AWS Z49.1 Welding Lens Shade Chart — By Process and Amperage
The table below presents both the minimum required shade and the suggested shade for comfort, drawn from the data in ANSI Z49.1-2005 (referenced in AWS Z49.1:2012, Table 1). The minimum shade is the floor required for safe protection; the suggested shade accounts for real-world visual comfort at the stated amperage range. Always start with a shade that is slightly too dark and work lighter until you can see the weld pool clearly — never start with a shade that is too light.
| Welding / Cutting Process | Arc Current / Amperage Range | Minimum Shade # | Suggested Shade # (Comfort) |
|---|---|---|---|
| Shielded Metal Arc Welding (SMAW / Stick) | Less than 60A | 7 | — |
| SMAW / Stick | 60–160A | 8 | 10 |
| SMAW / Stick | 160–250A | 10 | 12 |
| SMAW / Stick | 250–550A | 11 | 14 |
| Gas Metal Arc Welding (GMAW / MIG) & Flux Cored (FCAW) | Less than 60A | 7 | — |
| GMAW / MIG & FCAW | 60–160A | 10 | 11 |
| GMAW / MIG & FCAW | 160–250A | 10 | 12 |
| GMAW / MIG & FCAW | 250–500A | 10 | 14 |
| Gas Tungsten Arc Welding (GTAW / TIG) | Less than 50A | 8 | 10 |
| GTAW / TIG | 50–150A | 8 | 12 |
| GTAW / TIG | 150–500A | 10 | 14 |
| Plasma Arc Welding | Less than 20A | 6 | 6–8 |
| Plasma Arc Welding | 20–100A | 8 | 10 |
| Plasma Arc Welding | 100–400A | 10 | 12 |
| Plasma Arc Welding | 400–800A | 11 | 14 |
| Plasma Arc Cutting (Light) | Less than 300A | 8 | 9 |
| Plasma Arc Cutting (Medium) | 300–400A | 9 | 12 |
| Plasma Arc Cutting (Heavy) | 400–800A | 10 | 14 |
| Air Carbon Arc Cutting (Light) | Less than 500A | 10 | 12 |
| Air Carbon Arc Cutting (Heavy) | 500–1,000A | 11 | 14 |
| Oxy-Fuel Cutting (Light) | n/a | 3 | 4 |
| Oxy-Fuel Cutting (Medium) | n/a | 4 | 5 |
| Oxy-Fuel Cutting (Heavy) | n/a | 5 | 6 |
| Torch Brazing | n/a | — | 3 or 4 |
| Torch Soldering | n/a | — | 2 |
| Carbon Arc Welding | n/a | — | 14 |
Source: ANSI Z49.1-2005, Table 1 — Filter Lens Shade Numbers for Protection Against Radiant Energy. Note: Lighter filters may be used when the arc is hidden by the workpiece. In oxy-fuel work where the torch produces a high yellow light, use a filter that absorbs the yellow/sodium spectral line.
Shade Recommendations by Welding Process — In Detail
Stick Welding (SMAW) Lens Shade
Stick welding produces a high-intensity arc with significant UV and IR output, especially at higher amperages. For the most common hobby and shop applications — typically 90–160A with 3/32" or 1/8" 6013, 7018, or 6011 electrodes — Shade 10 is the working standard. Production stick welding above 200A (structural, heavy plate) warrants Shade 12. Pipeline root passes often run 60–90A on 6010, where Shade 9 or 10 is appropriate.
- 60A and under: Shade 7 minimum (light tack welding)
- 60–160A (most shop stick welding): Shade 10 recommended
- 160–250A: Shade 12 recommended
- 250–550A (heavy structural/industrial): Shade 14 recommended
MIG Welding (GMAW) Lens Shade
MIG welding's arc brightness depends heavily on wire diameter, shielding gas, and transfer mode. Short-circuit MIG at 100–150A is noticeably less intense than spray-arc MIG at 280A. A Shade 10 or 11 is the default for most shop MIG work (110–200A); heavy-gauge spray-arc applications should use Shade 12–14.
- Under 60A (thin sheet, short-circuit): Shade 7 minimum
- 60–160A: Shade 11 recommended
- 160–250A: Shade 12 recommended
- 250–500A (heavy MIG/spray arc): Shade 14 recommended
Flux-Cored Arc Welding (FCAW) Lens Shade
FCAW shares the same shade table as GMAW (MIG). The flux generates additional spatter and UV radiation at equal amperages compared to solid-wire MIG, so when in doubt, choose the higher shade within the suggested range. FCAW-G (gas-shielded flux-cored) at 200–250A: use Shade 12. FCAW-S (self-shielded) at the same amperage: use Shade 12–13 for additional comfort.
TIG Welding (GTAW) Lens Shade
TIG produces one of the most visually intense arcs for its amperage, particularly on aluminum with high-frequency AC. Visibility of the tungsten and weld pool is critical — using too dark a lens causes missed starts and contamination. The standard industry recommendation for most TIG work (50–200A) is Shade 10–12.
- Under 50A (precision sheet work, root passes): Shade 10 recommended
- 50–150A: Shade 12 recommended
- 150–500A: Shade 14 recommended
Plasma Cutting Lens Shade
Plasma cutting arc intensity varies enormously — a 30A handheld plasma cutter is far less intense than a 400A CNC cutting table. For handheld machines under 60A (e.g., Lincoln Tomahawk 375 Air or 625), Shade 8–9 provides adequate protection. Higher-amperage plasma cutting (300A+) requires Shade 12–14.
Oxy-Fuel (Oxy-Acetylene) Lens Shade
Oxy-fuel cutting and welding does not produce an electric arc, but the gas flame emits intense visible light and infrared radiation. Standard cutting goggles or welding goggles with Shade 4–6 are used for oxy-fuel work. Torch brazing requires Shade 3 or 4. Never use arc welding shades for oxy-fuel — they are excessively dark and reduce visibility dangerously.
Passive vs. Auto-Darkening Welding Helmets — Side-by-Side Comparison
The choice between a passive (fixed-shade) helmet and an auto-darkening helmet significantly affects productivity, eye strain, and safety when switching between processes. Here is a direct comparison:
| Feature | Passive (Fixed-Shade) Helmet | Auto-Darkening Helmet |
|---|---|---|
| Shade adjustment | Fixed — one shade per lens (typically Shade 10) | Variable — typically Shade 9–13 (some 5–13); adjustable dial |
| Darkening speed | Always dark (no transition) | 1/25,000–1/30,000 second (arc detection to full dark) |
| Resting (light) state | Dark — must flip up to see workpiece | Shade 3–4 light state — see workpiece without flipping |
| Best for | Single-process welders; consistent amperage; budget users | Multi-process welders; production shops; switching amperages |
| Eye strain | Higher — repeated helmet flipping, alignment errors | Lower — continuous clear vision; reduces neck fatigue |
| Weld start quality | Lower — weld position estimated, not seen | Higher — welder can precisely position torch before strike |
| Battery / power required | None | Solar + battery (most models); battery replacement required |
| ANSI Z87.1 compliance | Yes, if lens is rated | Yes — ANSI Z87.1 requires switching speed and shade range compliance |
| Price range | $20–$60 (lens only to full helmet) | $60–$400+ (hobbyist to professional Lincoln Viking series) |
| Example products | Standard fixed-shade hoods | Lincoln Viking 3350 (Shade 9–13), Lincoln K3028-1 |
Recommendation: If you weld a single process at consistent amperage (e.g., all stick welding at 125A), a quality fixed-shade helmet with Shade 10 is perfectly adequate and highly reliable. If you switch between TIG, MIG, and stick — or frequently adjust amperage — an auto-darkening helmet at Shade 9–13 pays for itself in reduced fatigue and better weld starts within the first week of use.
Browse our full selection of auto-darkening welding helmets and all welding helmets and hoods including Lincoln Electric's professional-grade Viking series.
ANSI Z87.1 and AWS Z49.1 — What These Standards Mean for Welders
ANSI Z87.1 is the American National Standard administered by the American National Standards Institute (ANSI) that governs occupational and educational eye and face protection — including welding lenses, safety glasses, face shields, and welding helmets. Any lens or helmet marked "ANSI Z87.1 compliant" has been tested for:
- Optical density at the specified shade number (UV, visible, and IR filtration)
- Impact resistance (high-velocity projectile tests)
- Flame resistance and lens retention under heat
- Light leakage (no radiation leaks around the lens edges)
- Lens quality and optical clarity (distortion limits)
AWS Z49.1:2012 (Safety in Welding, Cutting, and Allied Processes) is the American Welding Society's safety standard that incorporates the ANSI Z87.1 lens requirements and extends them to cover all aspects of welding safety — ventilation, fire prevention, electrical safety, and compressed gas. The shade number chart in this guide references the filter lens data in AWS Z49.1 Table 1 (which is itself drawn from ANSI Z49.1-2005 data).
Why this matters when buying a helmet: Never purchase a welding helmet or replacement lens that does not carry ANSI Z87.1 certification. Non-certified lenses may visually appear dark enough but fail to block the UV/IR bands that cause arc eye and retinal damage — the human eye cannot distinguish UV-blocked from unblocked lenses by appearance.
Protecting Your Eyes: The Science of Welding Eye Hazards
Welding arcs emit radiation across three bands simultaneously:
- Ultraviolet (UV) radiation: Causes photokeratitis (welder's flash / arc eye) — a painful inflammation of the cornea that feels like sand in the eye and typically manifests 6–12 hours after exposure. Repeated UV exposure accelerates cataract formation. UV radiation is invisible — you cannot tell you are being exposed.
- Visible light: The intensely bright visible arc causes temporary and, with repeated unprotected exposure, permanent retinal damage. The lens shade's primary job is suppressing visible light to a safe level.
- Infrared (IR) radiation: Heat radiation that slowly damages the lens of the eye. Cataracts in welders are a well-documented occupational hazard linked to cumulative IR exposure.
A properly rated ANSI Z87.1 welding lens blocks all three bands to safe levels at the specified shade number. There is no safe "squinting" at an arc — even brief unprotected arc exposure at close range can cause photokeratitis.
Choosing a Welding Helmet at WeldingMart
WeldingMart carries Lincoln Electric's complete helmet lineup — the most thoroughly tested auto-darkening and passive helmets in the North American market:
- Lincoln Viking 3350 Series: Auto-darkening, 4C lens technology for true-color vision, Shade 5–13, ANSI Z87.1 certified. Ideal for professional TIG, MIG, and stick welders who need maximum clarity.
- Lincoln Viking 2450: Auto-darkening, Shade 9–13, large viewing area, excellent for production MIG and stick welding.
- Lincoln VIKING 1740 Series: Entry-level auto-darkening, Shade 9–13, ANSI Z87.1, solar + battery powered.
- Fixed-shade passive helmets: Available in Shade 10 for single-process shop and field use.
Shop by category:
Not sure which helmet fits your process? Call WeldingMart at (715) 232-0345 — our staff weld with these helmets and can match you to the right shade range and model for your application.
Frequently Asked Questions About Welding Lens Shades
What shade lens do I need for stick welding (SMAW)?
For most stick welding between 60–160A (the most common hobbyist and shop range), Shade 10 is the standard recommendation. At 160–250A, use Shade 12. At 250A and above, Shade 14. These ranges come from AWS Z49.1 Table 1 and ANSI Z49.1-2005 data.
What shade lens do I need for MIG welding (GMAW)?
For MIG welding at 60–160A, Shade 11 is suggested. At 160–250A, use Shade 12. For high-amperage MIG (250–500A, e.g., spray-arc on structural plate), Shade 14 is the comfort recommendation. The minimum shade at 160A+ is 10; going to 11–12 significantly reduces eye fatigue on long production runs.
What shade lens do I need for TIG welding (GTAW)?
For TIG welding at 50–150A (the most common range for precision sheet metal, stainless, and aluminum work), Shade 12 is the standard recommendation. Below 50A (low-heat thin-gauge work), Shade 10 is acceptable. Above 150A, use Shade 14.
Auto-darkening vs. passive helmet — which is better?
Neither is universally better — it depends on your use case. Auto-darkening helmets provide variable shade adjustment (typically 9–13) and switch from a light viewing state to full dark in 1/25,000 of a second, enabling precise torch placement before the arc strike. They are superior for multi-process work, TIG root passes, and any situation requiring frequent amperage changes. Passive fixed-shade helmets (typically Shade 10) are simpler, more affordable, battery-free, and perfectly adequate for single-process work at consistent amperage.
What does ANSI Z87.1 mean on a welding helmet?
ANSI Z87.1 is the American National Standard for eye and face protection devices. A helmet or lens marked ANSI Z87.1 has been independently tested for optical density at the rated shade number, impact resistance, UV/IR filtration, flame resistance, and lens quality. It is the minimum certification you should require when purchasing any welding lens or helmet — non-certified lenses may not block the UV and IR radiation bands that cause arc eye and cataracts, even if they appear visually dark.
Is a darker shade always safer for welding?
No. Using a shade that is too dark for your process and amperage reduces visibility of the weld pool, leading to missed starts, poor fusion, inconsistent travel speed, and increased risk of workplace accidents from loss of spatial awareness. The correct shade is the darkest shade at which you can still clearly see the weld pool and workpiece. AWS Z49.1 recommends starting at a shade that is too dark and stepping lighter until adequate visibility is achieved — never start with a shade that is too light.
What is the darkest welding lens shade available?
Shade 14 is the darkest shade in common commercial use for welding. It is used for high-amperage stick welding (250A+), heavy plasma cutting, and carbon arc welding. Some specialty applications use Shade 15 or 16, but these are rarely needed in standard shop or field welding.