Additional Protection Ratings Required for Explosion-Proof Lights (IP66/IP67, IK10, Corrosion Resistance, etc.)

Explosion-proof certification (Ex) only prevents internal explosions. In real-world applications, additional protection ratings are essential to handle harsh environments.

1.Main Protection Ratings

RatingMeaningCommon RequirementRecommended LevelIP RatingDust & Water ProtectionIP66 (minimum)IP66 ~ IP67IK RatingMechanical Impact ResistanceIK08 ~ IK10IK10 (strongly recommended)Corrosion ResistanceResistance to chemicals & salt sprayC3 ~ C5C4 / C5MaterialHousing MaterialLow-copper aluminum, Stainless steel304/316 Stainless or Low-copper Aluminum

2.Detailed Explanation

IP66 / IP67 (Dust & Water Protection)

IP66: Protected against powerful water jets + complete dust protection (basic requirement).

IP67: Protected against temporary immersion in water (1m for 30min) — recommended for outdoor, wet, or wash-down areas.

Explosion-proof lights are often used outdoors or in rainy/washing areas. Insufficient IP rating can cause internal failures and compromise explosion-proof performance.

IK10 (Impact Resistance)

IK10 = Can withstand 20 Joules of impact (equivalent to 5kg object dropped from 40cm).

Portable and temporary lights: Must meet IK10.

Fixed lights: At least IK09.

Corrosion Resistance

C5 (highest): For severe offshore platforms and chemical plants with high salt spray.

C4: Suitable for normal coastal or chemical environments.

Common solutions: High-durability powder coating, 316 stainless steel, or anodized low-copper aluminum alloy.

3.Recommended Configurations by Application

Indoor chemical area: IP66 + IK09 + C3 (Basic)

Outdoor / wash-down area: IP66/IP67 + IK10 + C4 (Standard)

Offshore / high salt spray: IP67 + IK10 + C5 (Premium)

Portable / temporary lights: IP67 + IK10 + C4 (Mandatory)

Emergency lights: IP66/IP67 + IK10 + C4/C5 (Mandatory)

4.Procurement Tips
Always check the full certification report to verify IP/IK testing.

Example marking: Ex db IIC T4 Gb IP67 IK10

Portable lights usually require one level higher protection than fixed lights.

Housing must use low-copper aluminum alloy + anti-corrosion coating.

Summary Recommendation:

Minimum: IP66 + IK09 + C4

Best Balance: IP67 + IK10 + C5

details：https://seekingled.com/lo-series-led-linear-explosion-proof-lights

Product Video: https://youtube.com/shorts/nUjB5WcywmM

SEEKINGLED | Zone 1 & Zone 2 Explosion Proof LED Lights

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