Factories, warehouses, ports, tunnels, power plants and car parks expose luminaires to dust, water jets, vibration, impacts and chemicals. A fixture that works well in an office can fail within months in these conditions. Two ratings decide whether a luminaire will survive: the IP rating for protection against dust and water, and the IK rating for resistance to mechanical impact. This guide explains both and shows which values to specify for each industrial and infrastructure application.
For harsh environments, compare Alton Ray industrial LED floodlights and LED high bay lights with IP65 to IP66 die-cast aluminium bodies.
What Does the IP Rating Mean?
The IP code (IEC 60529) has two digits. The first shows protection against solid particles and dust, the second against water.
| Rating | Dust protection | Water protection | Typical use |
|---|---|---|---|
| IP20 | Fingers and objects over 12 mm | None | Dry offices and corridors |
| IP54 | Dust protected | Splashing water | Workshops, covered car parks |
| IP65 | Dust tight | Water jets | Warehouses, food plants, canopies |
| IP66 | Dust tight | Powerful water jets | Outdoor areas, ports, street lighting, wash-down zones |
| IP67 | Dust tight | Temporary immersion | In-ground and fountain lighting |
What Does the IK Rating Mean?
The IK code (IEC 62262) measures the impact energy a luminaire can withstand without damage.
| Rating | Impact energy | Equivalent | Typical use |
|---|---|---|---|
| IK06 | 1 J | 500 g dropped from 20 cm | Protected indoor areas |
| IK08 | 5 J | 1.7 kg dropped from 30 cm | Schools, stairs, public corridors |
| IK09 | 10 J | 5 kg dropped from 20 cm | Sports halls, warehouses with forklifts |
| IK10 | 20 J | 5 kg dropped from 40 cm | Car parks, tunnels, vandal-prone areas |
Not Sure Which IP or IK Rating You Need?
Describe your site conditions. Our engineers recommend luminaires that will survive dust, water, impact and heat.
IP66 Floodlights for Harsh Sites
Die-cast floodlights for plants, ports and perimeters. See all →
Recommended IP and IK by Application
| Application | Minimum IP | Minimum IK | Recommended luminaire |
|---|---|---|---|
| Warehouse and logistics hall | IP65 | IK08 | LED high bay |
| Heavy industry, foundry, steel plant | IP66 | IK08 | High bay with high-temperature driver |
| Food and beverage plant | IP65 to IP69K | IK07 | Sealed linear or cleanroom luminaire |
| Port, container yard, rail yard | IP66 | IK08 | High-power floodlight on high mast |
| Car park and tunnel | IP65 | IK10 | Vandal-resistant linear luminaire |
| Facade, perimeter and security | IP66 | IK08 | LED floodlight with narrow optics |
Beyond IP and IK: Other Durability Factors
- Thermal management: die-cast aluminium housings with large fins keep LED junction temperature low, which protects lumen output and lifetime in hot halls.
- Surge protection: industrial grids and long outdoor cables need 6 to 10 kV surge protection to protect drivers from lightning and switching spikes.
- Corrosion resistance: coastal and chemical environments need powder-coated or anodised housings and stainless steel fixings.
- Vibration: cranes, compressors and bridges require secure brackets and safety cables.
- Ambient temperature: check the rated operating range (for example -30 °C to +50 °C) for outdoor and furnace areas.
Optics and Mounting Height
Durability is only half of the solution; the light must also reach the working plane. Use narrow beams (30 to 60 degrees) for mounting heights above 10 m and high masts, wide beams (90 to 120 degrees) for heights of 6 to 8 m, and asymmetric optics for facades, yards and roads. Correct optics reduce the number of luminaires and the total energy cost.
High Bays for Factories and Workshops
Robust high bays for dusty and hot production halls. See all →
Planning a Plant or Infrastructure Project?
We prepare a free lighting calculation and a luminaire schedule with IP, IK and optics for every zone.
FAQ
Is IP65 enough for outdoor lighting?
IP65 protects against dust and water jets and is suitable for most covered outdoor areas. For fully exposed sites, ports and areas cleaned with high-pressure water, choose IP66.
What IK rating do I need for a car park?
Car parks and tunnels should use IK10 luminaires because of the risk of vehicle impact and vandalism.
Are IP and IK ratings tested?
Yes. Both are verified by standard laboratory tests (IEC 60529 and IEC 62262). Always ask the manufacturer for the test report.
Which Alton Ray luminaires are suitable for harsh environments?
Our high bays and floodlights are built with IP65 to IP66 die-cast aluminium bodies. Contact our team for a project-specific selection.