Illuma Rooms are a retired item from the American Girl MINI's collection. If you look closely you can see 2 OHC dolls in these. The AG mini dolls are smaller than the OHC dolls standing 6.5" tall compared to OHC's 9". Some AG mini dolls have glass eyes like the OHC dolls and some have painted eyes like Barbie. The normal AG size is 18".
Link includes pictures of the AG Illuma Rooms
American Girl Mini Rooms, released in October 2000, were small collections of display furniture set up in miniature rooms/dioramas. The line was canceled a few years later amid reports of high manufacturing costs and charges of defective manufacturing. Each room box above measures approximately 14" x 11 1/2" x 12"