When preparing specification sheets or sending RFQ for lighting projects, IP rating is one parameter you cannot overlook. Many project disputes happen because wrong IP grade fixtures are installed in damp or splash‑prone areas. Buyers only notice the problem after installation, leading to product failure and costly replacement.

IP stands for Ingress Protection. The two‑digit IP code tells how well a luminaire resists solid dust particles and water exposure.

• First digit: protection against solid objects and dust
• Second digit: protection against water splashes, spray or water immersion

Common IP grades for lighting projects

IP20 Only protected against large solid objects. No water‑resistance at all. Best for dry indoor locations: offices, retail shops, conference rooms, dry ceiling spaces. Never use in bathroom, kitchen or outdoor areas. This is standard for most indoor track lights and magnetic track systems.

IP44 Protected against solid particles above 1 mm and splashing water from any direction. Suitable for bathroom zones, covered balcony, covered shopping arcade, food preparation area with occasional splash. Cannot stand heavy rain or direct water jet.

IP54 Dust‑protected, limited dust ingress, resistant to water splashes. Popular for semi‑outdoor covered areas, warehouse loading bays, corridor exposed to wind‑driven rain. Dust will not accumulate inside to damage electronics.

IP65 Dust‑tight, protected against low‑pressure water jets from all directions. Works for fully outdoor locations: facade lighting, open‑air walkway, car park exterior. Can stand heavy rain washing. Not for full water submersion.

Note: IP67 / IP68 are for complete immersion, rarely needed for general commercial lighting projects.

Typical project mistakes with IP rating

1.Using IP20 indoor track light in covered patio Even though it is under roof, wind‑blown moisture and humidity can creep inside fixtures. Short‑circuit and early failure will occur within months.

2.Over‑specifying IP65 for all indoor rooms High‑IP fixtures cost more. Installing IP65 in normal dry office is unnecessary and wastes project budget. Match IP rating to real environment only.

3.Confusing “suitable for bathroom” marketing text with real IP number Some suppliers claim bathroom‑usable but only offer IP20. Always check official datasheet for printed IP code instead of relying on product description.

Practical RFQ tips

1.Classify your project areas before drafting specifications: dry / damp‑splash / fully outdoor. Assign corresponding IP rating for each zone.

2.Write exact IP requirement inside your RFQ document. Do not just tell supplier “for outdoor use”.

3.Request datasheets confirming IP rating. For tender projects, you can ask for IP test reports.

4.Remind contractors: do not substitute higher‑IP or lower‑IP products without project designer’s approval. Wrong substitution creates warranty risks.

Final CTA

If you are working on mixed‑environment projects combining indoor, damp‑area and outdoor spaces, share your site conditions with us. We can recommend suitable LED luminaires with matching IP grades and supply datasheets for your RFQ evaluation.