I would save some energy cost on Hermie's back by lighting the plants in place (if at all possible).

12 hours of tropical sun should be enough photonic energy to veg a pretty nice plant. All you'd need to provide for the additional 4 hours is enough light to prevent onset of flowering--not "growth-sustaining-level" light.

Would near-invisible light work? That's the lazyman way. Light 'em up in place, with light ya can't hardly see. Those ledengin deeps are starting to get invisible @ 735nm. Probably only need some kind of blue, though (?)