1. IP Rating Explained
Bathroom lighting uses the IPXX code. The two digits mean:
| 1st Digit (Solid Protection) | Meaning | 2nd Digit (Water Protection) | Meaning |
|---|---|---|---|
| 0 | No protection | 0 | No protection |
| 4 | Protected against solid objects >1mm | 4 | Protected against water splashing from any direction |
| 5 | Dust protected | 5 | Protected against water jets |
| 6 | Dust tight | 6 | Protected against powerful water jets |
| — | — | 7 | Protected against temporary immersion |
| — | — | 8 | Protected against continuous submersion |
2. Bathroom Zones (IEC 60364-7-701)
Bathrooms are divided into 4 zones based on moisture and splash risk:
🔴 Zone 0 — Inside the bath or shower basin
- Requirement: IPX7 or IPX8
- Luminaires must be fully sealed; capable of short-term or continuous submersion
- Typically use 12V low-voltage fittings
🟠 Zone 1 — Above the bath or shower, up to 2.25m
- Requirement: IPX4 minimum (IPX5 recommended)
- Protected against water splashing from any direction
🟡 Zone 2 — Horizontal 0.6m extension from Zone 1
- Requirement: IPX4
- Protected against water splashing from any direction
🟢 Zone 3 — All other dry areas
- Requirement: IPX0 or IPX1 (standard luminaires acceptable)
- E.g., vanity mirror lights, general ceiling lights
3. Lighting Type Recommendations
Vanity / Mirror Lights
- Location: Zone 3 (above or beside the mirror)
- IP Rating: IP20 sufficient
- Advice: Choose 4000K–5000K neutral white, CRI Ra ≥ 80 (Ra ≥ 90 preferred for grooming/makeup)
- Style: LED strip lights or wall sconces
General Ceiling Light
- Location: Zone 2 or Zone 3
- IP Rating: IP44 minimum (splash-proof + dust-proof)
- Advice: Flush-mounted sealed fixture; avoid complex shapes that trap dust
- Brightness: 5–8W per m² (LED equivalent)
Shower / Bath Overhead Light
- Location: Zone 1
- IP Rating: IPX5 or higher
- Advice: Recessed waterproof downlight with sealed glass cover
Ambient / Night Light
- Location: Zone 3
- Advice: Warm white 2700K–3000K, motion-sensor enabled for safe nighttime use
4. Key Buying Checklist
| Factor | Recommendation |
|---|---|
| Waterproof Rating | Shower area ≥ IPX5; dry area ≥ IPX4 |
| Voltage Safety | Zones 0/1 should use 12V low-voltage fittings |
| Colour Temperature | General: 4000K neutral; Night: 3000K warm |
| CRI (Colour Rendering) | Ra ≥ 80 general; Ra ≥ 90 for vanity |
| Material | Aluminium or stainless steel base + acrylic/glass diffuser, corrosion-resistant |
| Certification | Look for CE marking + IP test report |
| Mounting Height | Minimum 2.25m above floor in shower areas |
5. Common Mistakes
❌ Myth 1: “A standard ceiling light is fine in the bathroom.”
✅ Bathrooms are high-humidity environments. Standard fixtures risk short circuits and yellowing. Always use IP44+.
❌ Myth 2: “Brighter is always better.”
✅ Recommended illuminance is 100–200 lux for general bathroom use; overly bright light causes glare. Add dedicated task lighting at the mirror.
❌ Myth 3: “Only the second IP digit matters.”
✅ Both digits matter. Bathrooms face both dust and moisture, so IP44 (dust-protected + splash-proof) is the practical minimum.
0 Comments