IP66 Rated LED Lighting

What IP66 Means

The IP (Ingress Protection) rating system uses two digits: the first indicates solid/dust protection on a scale of 0–6 (6 being fully dust-tight, allowing no dust ingress), and the second indicates water protection on a scale of 0–9K (6 meaning the fixture is protected against powerful water jets from any direction, without harmful ingress).

IP66 is one of the most common ratings specified for outdoor and industrial lighting, since it covers both complete dust exclusion and strong resistance to rain, spray, and directed water jets — conditions typical of outdoor sites and many industrial wash-down areas.

IP66 vs. IP67

Both ratings offer full dust protection, differing in their water protection level:

• IP66 protects against powerful water jets from any direction, but not temporary submersion.
• IP67 adds protection against temporary immersion in water up to a specified depth and duration, beyond jet-spray resistance.

IP66 is generally sufficient for most outdoor and wash-down applications; IP67 is reserved for locations with higher risk of standing water or temporary flooding.

Where IP66 Is Needed

• Outdoor industrial and exposed installations — rain, spray, and general weather exposure
• Wash-down facilities and food processing — routine high-pressure water cleaning procedures
• Facilities with high dust or moisture exposure — general industrial environments requiring robust ingress protection

Choosing the Right Rating

IP66 covers the majority of outdoor and industrial wash-down scenarios. Facilities with risk of standing water, flooding, or fixtures mounted near ground level in flood-prone areas should evaluate whether IP67 is more appropriate given the additional submersion protection it provides.