How to calculate lux and Lumens?

Bedroom

General bedroom lighting: 100–150 lux

Reading or task lighting: 300–500 lux (for bedside or desk areas)

Total lumens required=Lux level×Room area (m²)

• At 100 lux: 100×10.23=1023 lumens
• At 150 lux (for a brighter option): 150×10.23=1535 lumens

For Reading Corner or Task Lighting:

At 300 lux: 300×task area size (m²)

If it’s a 1m² bedside table area: 300×1=300 lumens (per lamp)

At 500 lux: 500×1= 500 lumens

Final Summary:

• 1 ceiling light of 1200 lumens (LED bulb around 12–14W)
  
• 2 bedside lamps of 400 lumens each for reading (5W LED)
  

This would comfortably light bedroom for both general use and task lighting.

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Bathroom

General bathroom lighting: 200–300 lux

Task lighting (mirror, shaving, makeup area): 500–1000 lux

Total lumens required=Lux level×Room area (m²) 

For General Lighting:

• At 200 lux: 200×4.5=900 lumens
• At 300 lux: 300×4.5=1350 lumens

If mirror/task area is about 1 m²:

• At 500 lux:  500×1=500lumens
• At 1000 lux: 1000×1=1000lumens

Final Summary:

• 1 ceiling LED light of 1200 lumens (12–14W LED)
  
• 2 wall lights beside the mirror at 400 lumens each
  (or 1 strip light above mirror at 800 lumens)
  

This setup gives you bright, even lighting for both showering and grooming tasks, while avoiding harsh shadows around the face.

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Entry Hall

Entry/Hallway lighting: 100–200 lux

(It should feel welcoming but not overly bright.)

• At 100 lux:  100×6.2=620 lumens
• At 200 lux:  200×6.2=1240 lumens

Suggestion: 

1 ceiling fixture of 1000 lumens (around 10–12W LED)

Optionally, add small wall sconces or accent lighting (300–400 lumens each) for a warmer, layered look — especially if you have artwork, a mirror, or a coat hook area you’d like to highlight.

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Living Room

For living rooms:

• General ambient lighting: 100–300 lux
  (100 lux for cozy mood lighting, 200–300 lux for a brighter, more functional space)
  
• Task lighting (like reading corners or workspaces): 300–500 lux
  
• Accent lighting (for décor, shelves, or art): 150–200 lux on those areas
  

For General Lighting:

• At 100 lux: 100×21.4= 2140  lumens
• At 200 lux: 200×21.4=4280 lumens
• At 300 lux: 300×21.4=6420 lumens

Final Summary:

Lighting Example:

• General lighting:
  
  • 3–4 ceiling downlights at 1000–1200 lumens each
    or
    
  • 1 central fixture at 2500–3000 lumens plus wall sconces
    
• Task lighting:
  
  • 1–2 floor or table lamps at 400–800 lumens for reading corners or workspaces
    
• Accent lighting:
  
  • LED strip or spotlights at 200–300 lumens for shelves, art, or decorative elements
    

Kitchen & Dining Area Size:

Recommended Lux Levels:

Lighting standards for these areas:

• General kitchen lighting: 300–500 lux
  
• Worktop/task lighting (over counters, stove, sink): 500–750 lux
  
• Dining area lighting: 200–300 lux (warm, inviting atmosphere)
  

💡 How Many Lumens You Need:

Using:

Total lumens required=Lux level×Room area (m²)\text{Total lumens required} = \text{Lux level} \times \text{Room area (m²)}

For General Lighting:

• At 300 lux: 300×14.8=4440 lumens
• At 500 lux: 500×14.8=7400 lumens

For Dining Area (assuming ~5 m² of that 14.8 m² is the dining zone):

• At 200 lux: 200×5=1000 lumens
• At 300 lux: 300×5=1500 lumens

Final Summary:

Lighting Example:

• Ceiling downlights or track lights:
  5–6 downlights at 800–1000 lumens each evenly spaced across the kitchen
  
• Pendant lights over dining table:
  2–3 pendants at 400–600 lumens each, ideally dimmable for mood control
  
• Under-cabinet LED strips for counters and sink:
  Continuous strips or spotlights at 500–800 lumens per meter to eliminate shadows while cooking
  

Pro Tip:

Use 4000K (cool white) lighting in the kitchen for clarity and 2700K–3000K (warm white) for the dining area to create a cozy atmosphere.

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Balcony

Recommended Lux Levels:

• General balcony lighting: 100–150 lux
  (You want it pleasant for evening use without being harsh)
  
• Accent/decorative lighting: 50–100 lux (for plants, wall décor, or railings)
  
• Task lighting (if dining or reading outside): 200–300 lux over that specific area
  

For General Lighting:

• At 100 lux: 100×9.8=980 lumens
• At 150 lux: 150×9.8=1470 lumens

Final Summary:

Lighting Example:

• 1–2 wall-mounted outdoor lights or ceiling lights at 600–800 lumens each
  
• Fairy lights, lanterns, or LED strips for accent lighting — around 200–400 lumens total
  
• Portable floor/table lamps or hanging pendant (if dining outdoors) at 300 lumens
  

Pro Tip:

Use warm white (2700K–3000K) for balconies — it feels cozy and inviting at night. Also, choose weather-resistant (IP44 rated or higher) fixtures for outdoor durability.