Ingress Protection
The international protection system classifies luminaires according to the degree of protection provided against the ingress of foreign bodies, dust and moisture. The degree of protection is indicated by the letters IP followed by two numbers. The first number indicates the degree of protection against the ingress of foreign bodies and dust. The second indicates the protection against the ingress of moisture. The below table shows the degree of protection indicated by each number.
| First Number | Degree of Protection | Second Number | Degree of Protection |
| 0 | Not protected | 0 | Not protected |
| 1 | Protected against solid objects greater than 50mm | 1 | Protected against dripping water |
| 2 | Protected against solid objects greater than 12mm | 2 | Protected against dripping water when titled up to 15 degrees |
| 3 | Protected against solid objects greater than 2.5mm | 3 | Protected against spraying water |
| 4 | Protected against solid objects greater than 1.0mm | 4 | Protected against splashing |
| 5 | Dust-protected | 5 | Protected against water jets |
| 6 | Dust-tight | 6 | Protected against heavy seas |
| 7 | Protected against the effects of immersion | ||
| 8 | Protected against submersion to a specified depth |