This set of 12 DAZ Studio 4.5+ lights includes 11 associated skydomes. Ranging from clear sky, light cloud, cumulus cloud, foggy, heavy cumulus, sunset, night clear, night clouds, dusk, hazy and overcast. Each light is parented to the skydome, so rotate and get different lighting angles with an alternative sky backdrop. All light sets have been split into Indirect Lighting and Occlusion Light options. Be aware that the IDL versions will render a lot slower than the Occlusion option, but the bounce light will be a lot nicer.
This set is a perfect tool for your lighting needs.
Here's the link: http://www.daz3d.com/predatron-essential-lights-skies