GTA-671/691-Panel Set Diffuser Vienna Series

The Domus GTA-671/691 is a replacement panel set for the VIENNA series — available in Small and Large, supplied as a set, made to order.

⭐ Two sizes on one page — and the two ranges are not interchangeable

• ⭐ The part reference itself names both: GTA-671 for the standard VIENNA and GTA-691 for the VIENNA LARGE. ⭐ They appear here as Small and Large variants.
• ⭐⭐ THE VIENNA LARGE IS A PARALLEL RANGE, NOT A SIZE OPTION ON THE STANDARD ONE. ⭐ Different bracket references, different arrangements, different lanterns. ⛔ So the panels do not swap: a Small set will not fit a Large lantern and a Large set will not fit a Small one.
• ⚠ THAT MAKES THE VARIANT CHOICE THE WHOLE DECISION ON THIS PAGE. ⭐ On a single-size part a wrong order is a delay; ⛔ here it is a delay on a made-to-order item, which is ten days each way.
• ⭐ IDENTIFY BY THE GT CODE ON THE FITTING, NOT BY EYE. ⭐ The two VIENNA sizes look alike in isolation — the difference only reads when they are side by side, which they usually are not. ⭐ The code is on the original invoice or a label inside the fitting.
• ⭐ IF THERE IS NO CODE, MEASURE A PANEL AND SEND US THE FIGURE with a photograph. ⭐ We will confirm the variant before you order.

⭐ A set, because panels age together

• ⭐⭐ A LANTERN HAS FOUR OR MORE PANELS AND THEY WEATHER AT THE SAME RATE. ⭐ UV clouds acrylic and coastal air etches glass on every face equally.
• ⭐ SO REPLACING ONE PANEL IN A WEATHERED LANTERN LEAVES A BRIGHT FACE AMONG DULL ONES — ⭐ which from a distance reads worse than the crack you were fixing.
• ⭐ THE SET ALSO WORKS OUT CHEAPER ACROSS A DECADE — ⭐ one order with one lead time, rather than four single-panel orders with four.
• ⚠ THE EXCEPTION IS A NEW LANTERN. ⭐ If nothing has aged yet, a single panel is the sensible purchase — ask us what is available separately.

⭐ Why a panel set is worth more on this range than most

⭐ The VIENNA fittings are made to order in five colours. ⭐⭐ THAT MEANS A REPLACEMENT LANTERN IS NOT A SHELF ITEM: it is ten business days and a new finish applied to your order. ⭐ A new lantern arriving beside five that have weathered for six years will not match, however carefully the colour was specified — powder coat fades, and it fades outdoors. ⭐ Replacing the panels keeps the original castings, the original finish and the original patina, which is the thing you cannot buy back. ⭐ On a heritage or a carefully specified frontage that is the argument for stocking a spare set.

⭐ Acrylic and glass fail on different schedules

• ⭐ ACRYLIC YELLOWS AND CLOUDS UNDER UV rather than cracking. ⭐ The light output falls gradually, often by enough to notice long before anyone identifies the cause.
• ⭐ GLASS DOES NOT YELLOW but it etches in coastal air and it breaks outright.
• ⭐⭐ SO ACRYLIC IS REPLACED ON APPEARANCE AND GLASS ON BREAKAGE. ⚠ Which means an acrylic lantern gives you years of warning and a glass one gives you none.
• ⭐ IF A LANTERN LOOKS DIMMER AND THE LAMP IS NEW, CHECK THE PANELS. ⚠ People usually replace the lamp twice before they think of it.

⭐ What this part does not have, and why that is right

⭐ No voltage, no wattage, no IP rating, no lamp base. ⭐⭐ A PANEL SET IS PASSIVE AND SHOULD PUBLISH NO ELECTRICAL SPECIFICATION. ⭐ This one correctly publishes only a warranty. ⚠ That is unusual here: 83 of 104 passive parts in this catalogue — diffusers, bases, adaptors, brackets and spares — carry an electrical field they cannot have. ⭐ An absent specification on a passive part is the right answer, not a gap.

⛔ Made to order

Allow up to 10 business days for production. ⚠ Plan for it: damage is discovered when you want it fixed. ⭐ On a property with several VIENNA lanterns, one spare set on a shelf turns a ten-day wait into an afternoon.

✅ What is published

Where it works

• ⭐⭐ Restoring weathered VIENNA lanterns — ⭐ keeping the original finish.
• ⭐ Heritage and carefully specified frontages — ⭐ patina you cannot rebuy.
• ⭐ As a shelf spare — ⭐ it removes the ten-day wait.
• ⛔ Not ordered without confirming Small or Large — ⭐ they do not swap.
• ⚠ Not identified by eye — ⭐ use the GT code.

Specifying it

Replacement diffuser panel set for the VIENNA series. Small (GTA-671) or Large (GTA-691). Supplied as a set. No electrical parts. Made to order, up to 10 business days. 1-year warranty. ⭐ THE VARIANT CHOICE IS THE WHOLE DECISION ON THIS PAGE. VIENNA LARGE is a parallel range rather than a size option on the standard one — different bracket references, different arrangements, different lanterns — so the panels do not swap in either direction. The two sizes look alike in isolation, and they usually are in isolation, so identify by the GT code on the fitting rather than by eye. ⭐⭐ AND A PANEL SET IS WORTH MORE ON THIS RANGE THAN MOST, because the lanterns are made to order in five colours: a replacement lantern is ten days and a new finish, which will not match five that have weathered six years. Replacing panels keeps the original castings, finish and patina.

Supplied and supported by Lights For You.