The K rating of an LED light bulb refers to its color temperature, measured in Kelvin (K). It indicates the warmth or coolness of the light emitted, with lower K values producing a warmer, yellowish light, and higher K values giving a cooler, bluer light.
Common K Ratings and Their Characteristics
| K Rating | Light Color | General Feel | Ideal Applications |
|---|---|---|---|
| 2700–3000 K | Warm White | Cozy, relaxing, similar to incandescent | Living rooms, bedrooms, dining areas |
| 3500–4100 K | Neutral White | Balanced, neither too warm nor too cool | Offices, retail stores, kitchens |
| 4600–5000 K | Bright White | Clear, focused | Task lighting, workshops, garages |
| 5000–6500 K | Daylight/Cool White | Invigorating, blue-tinged | Commercial spaces, hospitals, outdoor areas |
| > 6500 K | Bluish White | Harsh, very bright | Specialized applications (e.g., photography, horticulture) |
Lower temperatures (2000K-3000K): Warm, yellowish light.
Mid-range temperatures (3500K-4100K): Neutral white light.
Higher temperatures (5000K-6500K): Cool, bluish light.
Highest temperatures (8000K-10000K): Daylight.
In residential settings, 2700–3000 K is popular for creating a comfortable atmosphere, while 4000–5000 K is often preferred for areas where clear vision is needed, like kitchens or home offices.
The K rating is typically printed on the bulb’s packaging or label, making it easy to choose the right light for your space. Some smart bulbs even allow you to adjust the K rating to switch between warm and cool lighting as needed.
So, when you see a number followed by “K” on an LED bulb, you’re looking at its color temperature, which directly impacts the mood and usability of the light.
Post time: Sep-13-2025
