7ft half patio umbrella Beige Scalloped Rectangular 7×7ft, Outdoor Garden Umbrella with 4 Ribs and Crank, UV Protection Shade Umbrella for Pool, Yard, Balcony : Patio, Lawn & Garden and entertaining Model:SHILTON SR10 BLUE / TITANIUM Kid Casters L.O.L. Surprise Hooks>>Micro Barbed

7ft half patio umbrella Beige Scalloped Rectangular 7×7ft, Outdoor Garden Umbrella with 4 Ribs and Crank, UV Protection Shade Umbrella for Pool, Yard, Balcony : Patio, Lawn & Garden and entertaining Model:SHILTON SR10 BLUE / TITANIUM Kid Casters L.O.L. Surprise Hooks>>Micro Barbed

Kid Casters L.O.L. Surprise Youth Fishing Kit

The difference in brightness levels is not 50% as measured with the Lux scale on my DMM but rather I measured that the lower level is approximately two thirds of the higher level

Hooks>>Micro Barbed

Model:SHILTON SR10 BLUE / TITANIUM

Here is an image of the rendering and the NURBS in shaded view

and entertaining