Question 1

What is color temperature in lighting?

Accepted Answer

Color temperature (Kelvin) describes light appearance: 2700K=warm/yellow, 4000K=neutral white, 5500K=daylight, 6500K=cool/blue. Lower values feel cozy; higher values feel energizing.

Question 2

What color temperature should I use?

Accepted Answer

Living/bedrooms: 2700-3000K warm. Kitchen/office: 4000-5000K neutral. Task/garage: 5000-6500K bright. Match existing lighting for consistency.

Question 3

What's the difference between lumens and lux?

Accepted Answer

Lumens measure total light output from a source. Lux measures light arriving at a surface. Same lumens in a smaller area = higher lux.

Question 4

How do I convert old wattage to lumens?

Accepted Answer

Roughly: 40W incandescent ≈ 450 lumens, 60W ≈ 800 lumens, 100W ≈ 1600 lumens. LED equivalents use 80-90% less power for same lumens.

Color Temperature Converter

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