How to Choose the Perfect LED Bulb: A Simple Guide to Lumens, Kelvins & More (Stop Wasting Money!)

Walking into a supermarket or browsing an e-commerce page, do you feel confused by unfamiliar terms on packaging—Lumens, Kelvins, CRI, Watt Equivalents? Choosing the wrong bulb not only wastes money but can also cause harsh glare, ruin the atmosphere, or even strain your eyes! Worry no more—this guide uses simple language to help you become an LED expert.

Brightness ≠ Wattage! Lumens Tell the Truth

• Myth: In the incandescent era, watts = brightness. But with LEDs, watts only indicate energy consumption—lumens reveal true brightness!

• Rule: Higher number = brighter light.

Color Temperature: The "Personality" of Light Sets the Mood

• Definition: Measured in Kelvins (K)—low K = warm yellow (cozy), high K = cool blue (alert).

• 2700K–3000K: Bedroom, living room (Relaxed | Candlelit dinner ambiance)

• 3500K–4100K: Kitchen, office (Neutral white | Focused work, easy on eyes)

• 5000K–6500K: Garage, workshop (Cool white | Precision repairs or crafts)

Color Rendering Index (CRI): The "Invisible" Truth-Teller

• Purpose: Measures how accurately light reveals an object’s true color (Sunlight = 100).

• CRI >80: Good for homes (clothes look natural)

• CRI >90: Essential for art studios/makeup mirrors (zero lipstick shade errors)

4-Step Buying Method: Perfect Match Guaranteed

1. Determine Brightness: Pick lumens based on room purpose (see table above).

2. Choose Ambiance: Select color temperature (cozy/energizing/crisp).

3. Check Color Truth: CRI >80 is a must; >90 for special tasks.

4. Verify Fit: Match base type (E27/E14/GU10, etc.).