I think the lantern will have more "mass" than a chandelier because you can define the shape of it quite easily in a visual sense. I would definitely not go with the 30x30. A chandelier can carry a 30" diameter in a smaller space because there is a lot of negative space or airspace around the parts that are Not 30" if you know what I mean. The lantern defines a relatively solid object. I would probably hang it lower than the chandelier pictured, as well, depending on the headroom.

What is the width of the foyer? https://www.shadesoflight.com/products/minimalist-iron-ring-chandelier-12-light?sku=CH17023+++IR&product_id=CH17023IR&adpos=1o3&creative=72522552152&device=c&matchtype=&network=s&gclid=CjwKCAiAoqXQBRA8EiwAIIOWskzCQC6jFzS_PFCx48r-PEdlyvyEohrJaPRp1TgyHnGSS_DChBOOkBoC-HwQAvD_BwE https://www.shadesoflight.com/products/castlebar-ring-chandelier-large?via=57e1330169702d78ae0000a5%2C58fe15bf617070305e001444 https://www.luxedecor.com/product/maxim-lighting-orbit-large-chandeliers-chandelier-mx25147oi https://www.luxedecor.com/product/fredrick-ramond-middlefield-large-chandeliers-chandelier-fdfr40579irr https://www.luxedecor.com/product/feiss-lighting-boulevard-large-chandeliers-chandelier-feif189184orb

You have a 228 inches ( 19' ) entry floor to second floor ceiling. You have a fixture totaling 107 inches with the mount and chain with 5" in that number for the mounting attachment, . You'd never want it less than eight feet off the floor to fixture bottom. Right ? So 11 inches is the ABSOLUTE MOST extra chain you could need or use.. My bet is you WON'T need another darn inch of chain !! The fixture bottom will simply hang with 108 inches "open" beneath it at entry foyer. And possibly more than that when it is held up for a visual using the whole six feet of chain : ) and the electrician actually REMOVES a few links.

^ agree with above - a two story foyer is going to need a significant fixture FWIW there are lots of formulas online that help with calculating fixture size in a foyer - here’s an example: Step 1: Measure the dimensions of your foyer’s length and width in feet Step 2: Combine the sum of the two numbers for your ideal fixture diameter (in inches) Step 3: Take the height of your ceiling in feet Step 4: Multiply the number of feet by the ceiling height by 2.5 and 3 inches to determine your ideal light fixture height For example, if your room measures 10’d x 10’w x 10’h, you would follow these steps as so: Step 1: 10-foot length x 10-foot width Step 2: 10 + 10 = 20. 20 inches will be our ideal diameter. Step 3: 10-foot ceilings Step 4: 10 x 2.5 = 25, and 10 x 3 = 30. 25” - 30” is ideal fixture height.