Specifically regarding camp/tent lighting:
Streamlight Siege and UST lanterns have low settings.
The D-cell lanterns have low, medium and high settings, with the low settings able to run 24/7 for a month or two (UST has both a 30-day lantern and 60-day lantern). They also have AA lanterns, but I don't have any of those.
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With questions about tents that large, and lanterns, I'm assuming this will be for car camping as opposed to backpacking, where weight is a big consideration, but an alternative is either the multi-AA or 18650 LiIon powered headlamps.
I'm a big fan of headlamps for general use. Having both hands free is a huge advantage when camping, changing a tire, messing around in attics, crawlspaces, engine bays and under vehicles etc. I keep an 18650 Zebralight in the glove box of every vehicle (I've tried the LiIon batteries, and they work even when the vehicle has been sitting for hours at -12f. I just make sure to charge the batteries every quarter/season change, or after using them for a decent length).
Having said that, as long as the tent has light colored walls, you can light the interior by hanging a headlamp near the ceiling and bouncing the light off the ceiling/walls, if you prefer more of a flood illumination. Less stuff to carry (and with 1 headlamp per person, you have lighting redundancy).