I managed to find the Sci-Fi Hangar at ShareCG.com and discovered that there is an open-end for environmental lighting to enter.  Apparently, the amount of environmental light needed to illuminate the hangar will be relatively high.  Instead of using the EZDome, I'm placing an HDRI into the Poser background and ramping its intensity.  But, by doing this, there will be an increase in background noise in the scene.  I'm experimenting now with lighting.