The Domus GT-556 Siena is a 300mm sphere on a post 1,570mm recorded height, 380mm deep, IP43,taking one E27 lamp, in aluminium. Five powder-coated colours.

This item is made to order

Up to 10 business days for production before it ships, because the body ispowder-coated in your chosen colour after ordering. Order a run together a laterbatch is not guaranteed to match.

Within a size class, the sphere is the only thing that changes

• Same post, bigger sphere. That is genuinely useful and appears on no listing: youcan choose the sphere size without changing the mounting height or the footprint.
• So the decision is purely visual. A 300mm sphere at 1,570mm is asubstantial object; 250mm reads lighter on the same post.
• It does not change the light. Both take one E27 lamp the bigger spherespreads the same output over a larger surface, so it glows a little less brightly and looks a littlesofter.
• On a wide frontage or a generous entrance the 300mm holds the scale. On anarrow path it dominates.

Its “Medium” name and the “Tall” post record the same height

• This Medium Post records 1,570mm. So does the GT-558 Sphere Tall Post, with thesame 300mm sphere.
• Across all 14 Siena posts, eight pairs are named differently and record identically within a single head count, where twin-head posts being taller is expected.
• We cannot tell whether the heights or the names are wrong. Buy on therecorded height, and ask us to measure one if it matters against a fence, a gateor a sight line worth doing before a made-to-order lead time starts.

What a sphere does, and what it does not

• It is an omnidirectional diffuser light goes in every direction rather thandown. A presence light, not a task light.
• So it will not put a pool on the ground. For a walking surface, a hooded path lightdoes that job.
• And the lamp is visible from every angle, so glare is a real consideration.Use a warm 810W E27 LED, not a bright cool one and on a 300mmsphere the larger diffusing surface helps, but only so far.

No maximum wattage, and no footing data

• One E27 lamp, not included, no maximum recorded anywhere in the range. 810W LED, warm, enclosed and damp rated. Ask us above about15W.
• No footing depth, base plate, fixing pattern or wind rating on any Siena post. A 300mm sphere at 1,570mm is the largest sail area of the single-head Sienaposts. Settle the footing with us before the concreter is on site.

Where it works

• Wide driveways and generous entrances, where the 300mm sphere holds thescale.
• Formal and period gardens.
• Paired at a gateway, matched with Siena pillar mounts on the piers.
• Not on a narrow path the 250mm GT-555 is the lighter option on thesame post.
• IP43, so not a wash-down or coastal front-line position.

Specifying it

300mm sphere post light. 1,570mm recorded height, 380mm deep. IP43.220240V AC. One E27 lamp not included. Aluminium. Beige, Black, Burgundy, Green orWhite. Warranty 1 year. Made to order allow up to 10 business days. This “Medium” and the GT-558 “Tall” both record1,570mm buy on the height, not the name. It shares its post height and depth with the 250mmGT-555, so the sphere is the only variable. No maximum lamp wattage, footing specification or windrating.

Supplied and supported by Lights For You.

Questions

What is the difference between this and the GT-555?

The sphere, and nothing else. This carries a 300mm sphere and the GT-555 a 250mm one, on a post recording the identical 1,570mm height and 380mm depth. So you can choose the sphere size without changing the mounting height or the footprint which is genuinely useful and appears on no listing. It does not change the light: both take one E27 lamp, so the bigger sphere spreads the same output over a larger surface and glows a little softer.

Is the “Tall” post taller than this one?

Not on the recorded figures the GT-558 Sphere Tall Post with the same 300mm sphere also records 1,570mm. Across all 14 Siena posts, eight pairs are named differently and record identically within one head count. We cannot tell whether the heights or the names are wrong, so buy on the recorded height and ask us to measure one if it matters against a fence or a gate worth doing before a made-to-order lead time starts.

When is the 300mm sphere the right choice?

On a wide driveway or a generous entrance, where a 250mm sphere would look under-scaled against the frontage. On a narrow path it dominates, and the GT-555 on the same post is the lighter option. Since both sit at the same height with the same footprint, it is purely a question of presence rather than a trade-off in coverage or mounting.

How long will it take to arrive?

Up to 10 business days for production. Domus builds it to order because the body is powder-coated in your chosen colour after you order, which is why five colours are offered rather than one stocked finish. If you are installing a run or a matched pair, order them together a second order starts its own ten days and a later powder-coat batch is not guaranteed to match.

Will it light my driveway?

It will mark it rather than light it. A sphere is an omnidirectional diffuser, so the light goes in every direction rather than down onto the surface you get soft presence and a glowing object, not a bright pool. If you need the driveway surface lit, use a hooded path light or a post light with a directional lantern, and keep the Siena spheres for the look.

What lamp should I use?

An E27 LED at 810W, warm at 27003000K, rated for enclosed and damp use. No maximum wattage is recorded anywhere in the Siena range, so ask us before going above about 15W. Warm and modest matters here because the lamp is visible from every angle through the diffuser the 300mm sphere’s larger surface helps spread it, but a bright cool globe will still be the brightest thing in the garden.

What footing does it need?

Not recorded on any Siena post no depth, base plate size, fixing pattern or wind rating. A 300mm sphere at 1,570mm is the largest sail area of the single-head Siena posts, so it is worth settling rather than guessing. Tell us the site and the soil and we will get the footing detail from Domus before your concreter is there.