I think I've struck a happy compromise: the CFL/LED combo seems to provide just the right amount of the appropriate light spectrums while keeping cabinet tempertures manageable.

My "24/0 vegging until the sprouts grow a second set of leaves" seems to have allowed the plants to grow short and bushy and avoided the legginess the 12/12 from seed seems to give. To save time I initiated 12/12 once the sprouts seemed healthy enough. This is what they look like now! :hippy: