lumens & color temperature by room
KelvinPlan
How much light each room needs, and what color it should be.
- 1Sone Ratings Explained, and Why 1.5 Is the Number That Matters
A fan that gets switched off moves no air at any rating. The sone figure is the specification that decides whether the fan you bought ever runs.
- 2Roof or Wall? Where a Bathroom Fan Should Discharge
Every route out of the house costs airflow and carries a different risk. The shortest one is usually right, and the soffit is usually wrong.
- 3The Fan Runs and the Mirror Still Fogs — Six Causes, in Order
The fan is rarely broken. It is usually starved of make-up air, fighting its own ductwork, or being switched off twenty minutes too early.
- 4Which Wire Gauge for a Landscape Run, and Why Bigger Is Usually Right
Cable is the cheapest part of the system while the trench is open and the most expensive part once it is closed. Size it for the garden you will have, not the one you are building.
- By Room5
- Color Temperature5
- Fixtures & Layout5
- CRI & Light Quality5
- Dimming5
- Room Lighting Calculators663
- Watt to lumen equivalent35
- Recessed Lighting Layout627
- Landscape Lighting136
- Bathroom Exhaust Fans575
- Uplighting a Tree: How Many Fixtures, What Beam, and Where to Stand Them
- When Half the Garden Goes Dark: Finding the Fault Without Digging
- GU10 or MR16? The Two That Look Alike and Are Not Interchangeable
- Same Lumens, Less Light — Why an Equivalent LED Disappoints
- Filament-Style LED Bulbs: What You Gain, and What You Give Up
- Downlights in a Bathroom: How Many, and the Zone That Decides the Rating
- Why Downlights Are Uncomfortable to Sit Under, and What Fixes It
- Home Office Lighting: 30–50 Footcandles, and Where the Desk Lamp Goes
- Hallways and Stairs: The Lowest Lumen Target and the Strictest Rules
Bathroom exhaust fan
572 calculations · Bathroom Exhaust Fans · browse all
Landscape lighting run
133 calculations · Landscape Lighting · browse all
- Landscape lighting for a 20 ft run at 6 ft spacing with 3 W fixtures
- Landscape lighting for a 50 ft run at 6 ft spacing with 4 W fixtures
- Landscape lighting for a 80 ft run at 6 ft spacing with 5 W fixtures
- Landscape lighting for a 110 ft run at 6 ft spacing with 7 W fixtures
- Landscape lighting for a 140 ft run at 6 ft spacing with 9 W fixtures
- Landscape lighting for a 170 ft run at 6 ft spacing with 12 W fixtures
Recessed lighting layout
624 calculations · Recessed Lighting Layout · browse all
- How many recessed lights for a 8 × 8 ft living room?
- How many recessed lights for a 10 × 12 ft living room?
- How many recessed lights for a 12 × 18 ft living room?
- How many recessed lights for a 14 × 26 ft living room?
- How many recessed lights for a 18 × 22 ft living room?
- How many recessed lights for a 22 × 26 ft living room?