Lighting
IP ratings for outdoor lighting explained
IP ratings tell you how well a luminaire resists dust and water. Misreading them is a common cause of outdoor lighting failures after import.
Read both digits
The first digit covers solids; the second covers water. IP65 is not the same as IP44—match the exposure.
Marketing ‘waterproof’ claims without a rating are insufficient.
Real-world caveats
Gasket ageing, poor install orientation, and blocked drains defeat a good IP rating.
Coastal spray and pressure washing may need higher protection or different materials.
Buying tip
Put the minimum IP on the RFQ and reject substitutes silently downgraded.
NMF flags outdoor SKUs with clear rating text for distributor sell sheets.