EQ Credit: Daylight (1–3 Points)

👉 “Daylight = 300–3000 lux + glare control”

👉 This credit is about bringing natural light into the building

Benefits:

• Better health (circadian rhythm)
• Higher productivity
• Reduced electric lighting

🎯 Intent

To connect occupants with the outdoors, reinforce circadian rhythms, and reduce electric lighting use

⚠️ CORE REQUIREMENT (VERY TESTABLE)

👉 Glare control devices are REQUIRED

• Must be:
  • Manual OR
  • Automatic with manual override

🔑 THREE OPTIONS

💻 OPTION 1: SIMULATION (SPATIAL DAYLIGHT)

📊 REQUIREMENTS

👉 Uses daylight simulation models

💡 OPTION 2: SIMULATION (ILLUMINANCE LEVELS)

📊 REQUIREMENTS

🔹 KEY CONDITION

• Illuminance must be:
  👉 300–3,000 lux
• At:
  👉 9 AM and 3 PM
• On:
  👉 Clear day at equinox

📏 OPTION 3: MEASUREMENT

📊 REQUIREMENTS

🔹 KEY RULES

• Measure:
  • Between 9 AM – 3 PM
  • At workplane height (30 inches)
• Take 2 measurements
  • At least 4–5 months apart

🧠 MEMORY STRUCTURE

👉 3 Options = Simulation, Simulation, Measurement

👉 Key numbers:

• 55 / 75 (Option 1)
• 75 / 90 (Option 2 & 3)
• 300–3000 lux
• 9 AM / 3 PM

🌞 GLARE CONTROL (VERY IMPORTANT)

✅ ACCEPTABLE

• Blinds
• Shades
• Curtains
• Movable louvers
• Movable screens/awnings

❌ NOT ACCEPTABLE

• Fixed overhangs
• Fixed fins/louvers
• Dark glazing
• Fritted glass

⚠️ SPECIAL CASE

👉 No glare control needed for:

• Diffused/translucent glazing

🧠 MEMORY TRICK

👉 “Movable = acceptable, Fixed = NOT acceptable”

💡 DESIGN STRATEGIES (PROJECT + EXAM)

• Building orientation (early design)
• Open floor plans
• Low partitions
• Interior glazing
• Daylight simulations early

⚠️ COMMON EXAM TRAPS

🧠 SUMMARY

👉 Daylight = light + no glare

👉 3 ways to prove it:

• Simulate it
• Calculate it
• Measure it