Yes! The “K” is the temperature (color) rating in Kelvins. In the simplest terms if the bulb is over 5,000k it is considered “cool” these are the lights that look more white or blue. If the bulb is under 5,000K with is labeled as “warm” these are the lights that look more yellow, orange, or even red. It can be a matter of choice, however, some research does indicate that warm LEDs produce less eye strain especially with reading.