Rob Zinn


Regular price $2,050.00

Viscosity is a uniquely shaped layered wall or ceiling sconce light, part of the award-winning Heliocentric lighting collection by Rob Zinn for blankblank. Colors applied to the back of each satin white layer glow subtly in natural light when the fixture is off but glow brightly when turned on or in darkness.

XL – 47″Hx22.5″Wx6.5″D
L – 40″Hx19.1″Wx6.5″D
M – 32″Hx15.25″Wx6″D
S – 24″Hx11.5″Wx6″D

S & M Sizes In Stock Now for Quick Shipment (1-2 Weeks, Exclusive of Transit Time): Sorbet, Cool, Minor & Warm (Major currently in-stock in size S only). See a comparison of our most popular multi-colorways here.

Please allow 3-4 weeks for the production of other colorways
Please allow 6-10 weeks for the production of larger quantities

Standard color options include Sorbet, Warm, Cool, Major, & Minor. 

Also available made to order in: Sky, monocolor Aether, monocolor Neon Yellow, monocolor Violet, Corona, Pine, Pastel or single colorways Neon Pink, Neon Red, Neon Orange, Orange-Red, Light Orange, Light Yellow, Lemon Yellow, Golden Yellow, Neon Green, Mint, Turquoise, Sky Blue, Soft Pink, Hot Pink, Cocoa Brown or Nut Brown, add $75 for these made-to-order colorways in S & M sizes. Email info (at) to order, please.

Designed for hardwiring with a standard junction box. Best when installed with a dimmer switch. L & XL not recommended for ceiling installation. Assembly required. UL listed for dry-to-damp locations. Made in Northern California.

Up to 75W A-19 soft white or equivalent bulb recommended, not included to avoid breakage. Option of Edison (standard, if unspecified) or GU24 socket, which complies with California Title 24 energy standards. Powdercoated steel front plane, aluminum rear planes, spacers and canopy. Please note that the center of the fixture does not sit over the center of the junction box, please email us at info (at) for mounting instructions to determine the ideal placement of the junction box.

Heliocentric Sconces Include Free Ground Shipping in the Continental U.S., as well as applicable sales tax. Click here to see the Expansion Sconce.

Click here to check out how we created our newest colorway, Sorbet.

Viscosity is customizable in each of its four sizes. Custom color combinations available with longer lead times, cost additional.

To purchase or inquire about options or showroom locations, please email us at info (at)

Heliocentric Lighting Colorways

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