Product Description from manufacturer (Willowlamp South Africa):

WINDCHIME -2018
A poetic interpretation of traditional bamboo windchime forms. The design is a circular tiered arrangement of repeated ‘windchimes’. The chandelier is illuminated by G4 LED’s in each windchime as well as 6 LEDs on top of the main frame which illuminate and cast dramatic shadows on the ceiling.
http://www.willowlamp.com/family.php?id=48 
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PRODUCT SIZE
Shade size: 700w x 1820h mm /
Total height: 2320m
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polys: 3091400
verts: 2445896

In order to optimize the model the modifier TurboSmooth (Iterations: 0 Render Iters: 2) is applied to the beads. When importing * obj file you must apply a similar anti-aliasing modifier.
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Who works in the V-Ray version is lower than 3.1. Be careful the materials in the BRDF section are Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you.

For Corona render it is recommended to put a version no lower than 1.5 since the glossiness of materials is configured with PBR