I saw you ask for me specifically in the chat box (and since it was after I had already left), so I figured I would post. Everyone above is right. The lamp with 3,000K may have more lumens, but it would look like crap. 3,000K is yellow orange and since there is more red, it would promote flowering over foliage, which isn't what we're after 99% of the time. Your daylight lamp may have fewer lumens, but it's a balanced spectrum so it will promote good growth and the plants will show off their color much better under it.
If you only have two lights, get at least two more.