09/07/2026
Choosing paint? Check your light bulbs, too.
The numbers on your bulbs can make a big difference in how paint colors look in your home.
Kelvin (K) measures the color temperature of light:
• 2700K–3000K: Warm, soft light with a cozy feel
• 3500K–4000K: More neutral, balanced light
• 5000K: Cooler, brighter light that feels closer to daylight
Then there’s CRI, or Color Rendering Index. CRI measures how accurately a light source shows colors compared with natural light, on a scale of 0–100.
• 80+ CRI: Fine for general household lighting
• 90+ CRI: Better for seeing paint colors, décor and finishes accurately
• 95+ CRI: Excellent color accuracy when seeing true color really matters
An easy way to remember it:
Kelvin tells you whether the light looks warm or cool. CRI tells you how accurately that light shows color.
Before choosing a paint color, check your samples under the lighting you actually use in the room. The same paint can look surprisingly different when the light changes.