Looking at your tent I was wondering if you were going to use both cobs for the duration. I just finished a test of 2 cobs (no reflectors) over three 3 gallon smart pots. That worked fairly well, but now I want to test 2 cobs (with reflectors) over one plant. I'll do that for two single plants.
www.cobshop.net cobs are fun as well as showing impressive results.