Nah he means that you need 2 different types of lights, not lumens. 6500k is a "bright white" bulb and the 2700k's which are "warm red".
You use the 6500k bulbs for the first part of the *grow when the lights are set to 18/4 (light is on for 18hours and off for 4 hours). The 2700k bulbs are...