Designer by RH Modern
https://www.rhmodern.com/catalog/product/product.jsp?productId=prod6420928&categoryId=cat7140180 

Overall: 60 "W x 11¼" D
Minimum Height: 60 "excluding all extension rods (can be shortened to 18½" with the help of a licensed electrician)
Maximum Height: 156 "(including all extension rods)
Canopy: 60 "W x 5" D x 1 "H
Rods: four 6 ", eight 12", four 18 "
Frame With Shades: 5½ "H
Weight: 60 lbs.

The archive includes:
3dsmax 2014 + vray 3.50.04
Vray OBJ.FBX