My guess is the 60 watt lights generate some heat...not so much in the bulb as in general. Check your overall temps too. And, yes, you are in the "bad" spectrum right now. You want some daylight bulbs--over 5000k. 6500k is even better.

Anyway, if you've got 13,600 lumens, you've got enough for a 2.5 to 3 sq. ft. grow. If you've got a square growing area, that's about 18 to 21 inches on a side. Anything under that, and you've got plenty of light. Your main issue is going to be height...you really need at least 36" to grow a single plant. If you're going for a SOG or SCROG, you'll want more small plants...get one or two gallon pots.