Thanks Tim, I’ll have another look at these, the biggest challenge we have found from an ArchViz perspective is that we need external and internal lighting to look good within one project - however most tutorials focus on either external or internal lighting separately. With our workflow as well, large meshes are unfortunately a necessary evil to keep our production time feasible, this also means that UV lightmapping and baked lights are out of the question for now 
which is scary because ideally we’d like to get our projects into VR but with our dynamic lighting we’re only getting 50FPS in places runing a GTX 1080 (admittedly on epic settings and 1920 x 1080 res) so I definitely have many many more lighting related settings to learn to improve on this! Ta, Kyle